Had many issues with the new architecture. Particularly troublesome:
- Wemo light switches,
- Airplay speakers (Sonos, Naim, Airport Express)
- HomePods/ATVs.
- Christmas lights (Twinkly).
Hue lights and Lutron Caseta switches sailed through the upgrade and are super stable - as usual - thank heavens! Ikea stuff pretty reliable too (but only after I returned my brand-new Dirigera hub and reverted to the old Tradfri hub). No problem with Ecobee thermostats and sensors.
One device
automation (fan auto-off) appeared to break after I recreated it as a shortcut, but I think that's because the device itself (wemo wall switch) now goes offline a lot.
In summary, I just spent a couple of days wiping my home and re-creating it. Lucky I'm off work. Had it up to here with HomeKit crap right now. Ready to put back some dumb switches.