Exactly this. The device either needs to be open enough that it can easily integrate to HA without internet access.
Or dumb enough that I can mod it with an ESP.
Anything that has to go through the manufacturer’s servers goes in the bin, the risks of data theft/rent seeking are too damned high.
Part of me also thinks that fediverse doesn’t need growth for the sake of growth.
That it’s primary function is to be an alternative if people want to use it.