The difference was night and day. The guest networks actually worked. They had uptimes of over a year without issue.
Sadly only _some_ Unifi AP models are supported by OpenWRT. Check before you buy. I use GL.inet stuff where possible now.
FWIW I don't trust the OEM firmware of any router. They're all a mix of crap, some intentional, some not.
That's my way to manage a few openwrt devices
No buggy software required.
I don't see any reason to believe this new access point won't support standalone, so I just ordered one to replace an older access point (an Amplifi Alien that was in Bridge Mode).
The access point should do nothing except convert between wired and wireless, which is all I ask. I have a separate, wired-only router.
On the UniFi U7 Pro, standalone mode was limited to 40MHz channel width on 5GHz and 160MHz channel width on 6GHz, which was a dealbreaker for me. The hardware is capable of 240MHz on 5GHz and 320MHz on 6GHz. So, I installed the controller on a local server and used that to configure the hardware to its fullest potential.
https://news.ycombinator.com/item?id=26639363
https://old.reddit.com/r/Ubiquiti/comments/scqlg3/what_happe...
https://www.bleepingcomputer.com/news/security/ubiquiti-user...