No need to panick, they themselves link to this as an archive of old versions: https://downloadarchive.documentfoundation.org/libreoffice/old/
So even if it's gone from their own site, it should remain there.

On 6 May 2018 at 00:30, Javier Agustìn Fernàndez Arroyo <elhoir@gmail.com> wrote:
hello again guys,

What if we get latest NT5 libreoffice version (5.4.6 as of now, and 5.4.7-rc1 is out) just for testing purposes? i guess it will be dropped from official website, andi don´t know if it will be still available in any way......

On Sat, Jul 1, 2017 at 9:29 AM, Michael Fritscher <michael@fritscher.net> wrote:
Hi,

is there a list which need to be done to get the basic NT6 architecture
just to get feeling how much work it is? Sadly, I'm afraid that we'll
need a proper NT6 architecture to get modern drivers running, won't we?

Best regards,
Michael Fritscher

On 30.06.2017 11:46, Ged Murphy wrote:
> That’s what’s currently being worked on.
>
> The kernel still closely follows the NT5.2 architecture, but user mode will have NT6+ compatibility shims to allow modern applications to run correctly.
>
> 
>
> From: Ros-dev [mailto:ros-dev-bounces@reactos.org] On Behalf Of ajaczgz@yahoo.es
> Sent: 30 June 2017 05:47
> To: ReactOS Development List <ros-dev@reactos.org>
> Subject: Re: [ros-dev] "Note: LibreOffice 5.4 will be the last codeline tosupport Windows XP or Vista"
>
> 
>
> I think it’s no neccesary to implement NT6, only to avoid the compatibility tests to NT6 and implement only the characteristics that the most of the programs uses.
>
> 
>
> Best regards
>
> Antonio J. Arrieta Cuartero
>
> 
>
> Enviado desde mi Lumia 635 con Windows 10 Mobile
>
> 
>
> De: Riccardo Paolo Bestetti <mailto:riccardo.kyogre@live.it>
> Enviado: jueves, 29 de junio de 2017 22:11
> Para: ReactOS Development List <mailto:ros-dev@reactos.org>
> Asunto: Re: [ros-dev] "Note: LibreOffice 5.4 will be the last codeline tosupport Windows XP or Vista"
>
> 
>
> Hello Colin,
>
> As this definitely wasn't the predominant thinking the last time this same discussion took place, Hermès' email scared me a bit. Thank you so much for clarifying.
>
> 
>
> Best regards,
>
> Riccardo Paolo Bestetti
>
> 
>
> -----Original Message-----
>
> From: Ros-dev [mailto:ros-dev-bounces@reactos.org] On Behalf Of Colin Finck
>
> Sent: giovedì 29 giugno 2017 20:00
>
> To: ros-dev@reactos.org <mailto:ros-dev@reactos.org>
>
> Subject: Re: [ros-dev] "Note: LibreOffice 5.4 will be the last codeline to support Windows XP or Vista"
>
> 
>
> Rest assured, we know that ReactOS won't be of much use if we stay NT5-only. Work is underway to provide a seamless support of NT6 applications on top of the existing codebase.
>
> Also the majority of developers should be using an NT6 platform themselves, so they certainly aim for support for NT6 applications.
>
> Finally, applications compiled by modern versions of Visual Studio are NT6-only by default, so supporting this platform is unavoidable.
>
> 
>
> Just my two cents, as the previous replies could lead you to believe we're failing the reality check.
>
> 
>
> Cheers,
>
> 
>
> Colin
>
> 
>
> 
>
> Am 29.06.2017 um 18:54 schrieb Riccardo Paolo Bestetti:
>
>> I’m just gonna snap in for my yearly IT guy NT6 rant: this mindset is
>
>> going to kill the project by making it useless whenever it reaches a
>
>> usable state.
>
>>
>
>> Windows XP/Server 2003 use is **already** marginal as of today, and
>
>> it’s only gonna get “worse” as more and more networks get infected by
>
>> ransomware and institutions all over the world wake up and update (and
>
>> as time passes of course). It’s not a matter of “fancy”, it is a
>
>> matter of what people use on their computers. With that argument you
>
>> may as well advocate for DOS.
>
>>
>
>> 
>
>>
>
>> Please don’t be offended, as always this is only intended as a reality
>
>> check.
>
>>
>
>> 
>
>>
>
>> Best regards,
>
>>
>
>> Riccardo Paolo Bestetti
>
>>
>
>> 
>
>>
>
>> *From:*Ros-dev [mailto:ros-dev-bounces@reactos.org] *On Behalf Of
>
>> *Hermès BÉLUSCA-MAÏTO
>
>> *Sent:* giovedì 29 giugno 2017 16:09
>
>> *To:* 'ReactOS Development List' <ros-dev@reactos.org <mailto:ros-dev@reactos.org> >
>
>> *Subject:* Re: [ros-dev] "Note: LibreOffice 5.4 will be the last
>
>> codeline to support Windows XP or Vista"
>
>>
>
>> 
>
>>
>
>> I’m wondering for which useless / fancy features they need Windows 7+
>
>> support only….
>
>>
>
>> 
>
>>
>
>> H.
>
>>
>
>> 
>
>>
>
>> 
>
>>
>
>> *De :*Ros-dev [mailto:ros-dev-bounces@reactos.org] *De la part de*
>
>> Javier Agustìn Fernàndez Arroyo *Envoyé :* jeudi 29 juin 2017 15:48 *À
>
>> :* ReactOS Development List *Objet :* [ros-dev] "Note: LibreOffice 5.4
>
>> will be the last codeline to support Windows XP or Vista"
>
>>
>
>> 
>
>>
>
>> https://wiki.documentfoundation.org/Releases/5.4.0/RC1
>
>>
>
>> 
>
>>
>
>> 
>
>>
>
>> FYI
>
>>
>
>>
>
>>
>
>> _______________________________________________
>
>> Ros-dev mailing list
>
>> Ros-dev@reactos.org
>
>> http://www.reactos.org/mailman/listinfo/ros-dev
>
>>
>
> 
>
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>
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>
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>
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>
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>
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>
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> 
>
>
>
>
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