While I don’t have the number of devices you do, I can add two observations:
Kwikset Zigbee Door Locks have been rock solid since the day I installed them. No issues dropping off the network. The only downside is occasional delay in reporting state (locked/unlocked) to HA. Getting it to respond to a command to lock/unlock is near instantaneous.
Ikea Zigbee devices have also been rock solid. The only issue is that none of them seem to report battery level reliably. Other than that, there are zero issues.
While I don’t have the number of devices you do, I can add two observations:
Kwikset Zigbee Door Locks have been rock solid since the day I installed them. No issues dropping off the network. The only downside is occasional delay in reporting state (locked/unlocked) to HA. Getting it to respond to a command to lock/unlock is near instantaneous.
Ikea Zigbee devices have also been rock solid. The only issue is that none of them seem to report battery level reliably. Other than that, there are zero issues.