

Fair point! As far as I can tell, the temp sensors are just beacons - anyone can connect and see that somewhere in your house it’s 72 °F, but who cares ¯\_(ツ)_/¯
If you’re running on a Raspberry Pi, you can just use the onboard BT, whose drivers are updated regularly.
ZigBee ones get occasional updates automatically detected through HA, and have to be moved to somewhere near the controller to update. I assume, as temperature and humidity sensing hasn’t changed, that these are security patches.
BT ones get no updates, which either means their security goes unpatched, or it really doesn’t matter when all they do is shout out measurements into the void.
I’ll run a backup and restore when moving to a new device, because why not. But regular backups? Meh, the ether can have my messages if my phone dies.
That said, depending on how this new system is rolled out, I may subscribe just to support the Signal foundation.