I seem to have been an outlier, but 3-5 years ago I went all in on Ubiquiti, except for APs, about a year ago pulled it completely out, partly because of problems with updates:

- One switch update enabled some sort of loop detection which broke the Google Wireless meshing with Ethernet backhaul, and their support people, after several attempts, proclaimed was not something that could be disabled. Fixed it by putting in a dumb Netgear switch that only connected the Google mesh nodes, but disappointing to find on a $400 "Prosumer" switch.

- One set of camera updates left 4 of my 5 cameras unbootable and support was unable to provide a solution for. This was after their warranty period, so I have them sitting around because I can't quite bring myself to throw them away.

I replaced the switch with a used Aruba PoE switch ($90), the cameras with a Montavue (VAR for HIKVision cameras), and BlueIris setup. It pained me because the Unifi Protect mobile app really was best in breed, but not too much because I frequently had issues with the cameras reliably booting, and would have to go through rebooting cameras for a few days after updates or a power loss.

I'd recommend Ruckus R610 used gear for wireless, though for the last ~6 months the prices on them have doubled -- I got one 9 months ago for $150 landed, and now they all seem to be more like $300+. Fantastic APs though.