That does also look like a good option. In my case, I have a Pi 4 running both zigbee2mqtt and zwave-js-ui using connected Zigbee and Zwave USB dongles placed centrally in the house (Eclipse mosquitto is running on a separate 3-server cluster). I've only briefly searched, but network zwave controllers seem to be much less common or more expensive, so I probably wouldn't benefit much from changing my Zigbee controller at the moment.