It’s mostly just creative automod rules, it’s not that big a deal and plenty of users would come up with solutions in short order.
I used to use Slack, but it lost its way. Arch is really, really cool, but I’ve become more interested in Void. Currently, perhaps surprisingly, I use Alpine because I like how minimal it is.
I don’t think any subs will stay permanently dark, their mods will be replaced eventually.
I haven’t yet, but I well might by the end of this month.
Alpine has gcompat which has worked well for me, and when I did try void so many years ago, I remember running into some problem after choosing musl only and then trying to get glibc to run after installing glibc packages. It was a long time ago and I’m sure the issue no longer exists though.
xbps-src does seem nice though, similar to checkinstall which I used to use on slackware.
Ultimately I just have to give it a try again and see if I like it better or not.