I still don't understand why it's that complicated, those addons are pretty small in size so they don't even take up much space on the drives.
Also, older mods, like last year's winter mod was still in mine and in mostly every player's mod folder and we all played fine with that in there, despite the lack of support.
So, if staff will remove the support for said addons, the client won't check for them anymore and we can leave them in the folder.
That is why I think you should enable some addons, like the frosty wheels and maybe the dimmed headlights one as well which increases the realism. No darker skies support, I get it and it's fine.