I've been following this for a while, mostly via Reddit - as that's actually the best source for news that I've been able to find for this particular topic.
I think I'll first link to the Solus Reddit page:
www.reddit.com
There hasn't been an update in more than two months, not even basic security updates. The head honcho quit. The person who was working on Budgie bounced to just working on Budgie (the DE that came with Solus and started with Solus).
There's more - including a lack of communication and seemingly a complete lack of structure within the project.
As such, I've felt obligated to say something for a while now, but I don't really feel it'd be an appropriate article for my site, not without a lot of effort on my part to at least do due diligence by trying to contact the people running the show. (Others have tried with no success.)
The servers were down for quite a while. The update server has been down for quite a while, if I'm understanding correctly. Nobody has mentioned it coming back online and I've not tested this. The web server was down and that was brought back up.
Budgie, the DE that got started with Solus, no longer recommends Solus.
docs.buddiesofbudgie.org
Here's another article (some strong language) that gives some details (they appear to have some prior biases as well):
boilingsteam.com
Anyhow, if I were a Solus user, I'd have packed my things and moved already because of this. It's probably time to stop recommending it (not that we ever do, so that's a bit pointless to say).
It's unfortunate, but I don't think I'd ever rely on them for anything important unless they made some drastic changes and upheld those changes for some time.
I think I'll first link to the Solus Reddit page:

r/SolusProject
r/SolusProject: A modern, desktop-focused Linux distro built from scratch. Official subreddit of the Solus Project (getsol.us), which includes the …

There hasn't been an update in more than two months, not even basic security updates. The head honcho quit. The person who was working on Budgie bounced to just working on Budgie (the DE that came with Solus and started with Solus).
There's more - including a lack of communication and seemingly a complete lack of structure within the project.
As such, I've felt obligated to say something for a while now, but I don't really feel it'd be an appropriate article for my site, not without a lot of effort on my part to at least do due diligence by trying to contact the people running the show. (Others have tried with no success.)
The servers were down for quite a while. The update server has been down for quite a while, if I'm understanding correctly. Nobody has mentioned it coming back online and I've not tested this. The web server was down and that was brought back up.
Budgie, the DE that got started with Solus, no longer recommends Solus.
Getting Budgie | Buddies of Budgie Docs
Get Budgie Desktop across the Linux operating system of your choice!
Here's another article (some strong language) that gives some details (they appear to have some prior biases as well):

Time to Stop Using (and Recommending) Solus - Boiling Steam
I’ve complained in the past about Solus (Linux distro) when they could not be bothered to fix their Steam Linux client packaging after Proton 5.13 was long out (they eventually did), but now it’s time to come to more radical… <a...

Anyhow, if I were a Solus user, I'd have packed my things and moved already because of this. It's probably time to stop recommending it (not that we ever do, so that's a bit pointless to say).
It's unfortunate, but I don't think I'd ever rely on them for anything important unless they made some drastic changes and upheld those changes for some time.