I have 3 C4s and have been running 2.2.4.X since 11/21. I have 1 hub per protocol: zigbee, zwave, LAN. Definitely had some challenges and some reboots of hubs. All has mostly been good though just 10 minutes ago I found my zwave hub locked up with a DB error message which is a first. Rebooted hub and it automatically restored last nights backup so no bueno.
You can always try it and I see from @gopher.ny there are dedicated links now to revert to older versions such as 2.2.3.
