I have a number of Apple Time Capsules (AIrport Extremes with disks in them) which I have tried to upgrade, and failed, a couple of times. One time because the access points I tried incompletely bridged from wireless to wired network and this broke all the Bonjour/mDNS services that needed to cross wired to wireless (looking at you Google!). The other one I tried was Synology’s mesh kit - but that was slower than the Airports.
Sadly it looks like I will need to start planning on replacing them soon. Apple provides a utility to configure the Airports (which I dislike - I much prefer having an on device HTML based config). I hit a bug on an M1 mac running Ventura in the utility. It no longer allows long WPA Personal passwords -stops at 32 chars. Mine is 33… I know it’s bit rot - old application starting to fail on new versions of the OS because I am able to set all 33 chars using Airport Utility on an Intel Mac running Catalina.
Ah well, the time had to come. Need to dive into mesh access points again.
Cheers. Liam