There is no need to migrate your existing devices to the new app, you can just keep using it as is!
Absolutely not! As you can keep using the old app, you can also keep using your favourite gen1 devices!
We will keep maintaining the app as long as enough users are still using it. It is actually open source, so even if we stop in the far future, the community or you can still use it.
We do not, as it simply isn’t possible with Homey without requesting full system API access which we obviously do not want. And as the old app can still be used next to the new one, we also believe that such a migration is not even needed.