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I think (some correct me) you can group most devices into the following categories: 1. Device requires internet for setup, and for usage 2. Device requires internet for setup, but after that don't need it anymore 3. Device can be fully setup without internet, and used without internet Personally I aim to be fully within 3 as much as I can, but some devices are really hard to find at a good price point that falls into…
I'm not buying any device that's not 3, everything else turns into a brick as soon as there's some larger change. I have some older Google Speakers, and while they seemed to be 2, after being powered off for long enough they can't be set up again, not even with internet access since their firmware was also outdated and the app isn't able to set them up again.
Don't recall if Shelly's default to 2 or 3 but I like that you can flash em to tasmota for a gaurenteed 3.