Nothing really. Arch is still great, I just kept having stuff happen where I’d suddenly find out there was a new bug in something at inopportune times. Just the nature of being bleeding edge. Nothing broke severely, but like if you want to join a Zoom call or play a game with friends or something, having something break randomly that you have to fix, even if it just takes a quick search or 5 minutes of troubleshooting can get tiresome.
Also, all of the customization stuff that Arch allows is not as appealing to me anymore since my skill level with Linux has reached a point where I can get super granular with pretty much any distro. Add to that flatpak reducing my need to depend on the AUR, and there you have it.