Number of Devices paired with a Sonoff Zigbee 3.0 USB Dongle Plus as coordinator

I am running Openhabian/Rpi with a Sonoff Zigbee 3.0 USB Dongle Plus as coordinator.
At the moment I have 89 devices paired and it still runs fine.
Any ideas/experiences on how high you can go?
Thanx in advance.
Torben

Up to 32 direct children, number of children not limited by firmware (see https://sonoff.tech/product/gateway-and-sensors/sonoff-zigbee-3-0-usb-dongle-plus-e/) - not sure about limits imposed by openHAB and/or Zigbee binding.

@chris
Could you provide additional insights?