I started with ZHA, but moved to Z2M because there was an automation blueprint I needed that was only coded for z2m.
Gotta say, I’m a much bigger fan of the z2m interface. There’s nothing wrong with ZHA but unless something major changes, I don’t see the need to ever switch back.
Unfortunately this will no longer be possible with the mg21 chip used in the blue switches. See Eric’s post linked below:
https://community.inovelli.com/t/zigbee-matter-motion-switch-project-linus-blue-series/10904/439?u=quaffs.cherub_0t