I guess I can only dream, but I hope they some day open up parts of it so that the phone app can continue working even with changes to Android/IOS down the line (if Fitbit doesn't want to keep the old Pebbles alive).
But with that said, a smart watch makes me feel hyper-connected. Putting it in quiet mode (and/or taking it off my wrist) every now and then is liberating and definitely makes me more productive.
I feel that you probably did not configure notifications. Each time I received a notification that is not important I went to Pebble, and disabled it, after a while pebble was no longer as annoying.
https://www.ifixit.com/Teardown/Pebble+Time+Teardown/42382
EDIT: there's also this post on the tech specs on reddit[0]. This looks pretty re-implementable if you're a hardware engineer looking to do something fun. The right component mix seems to have been figured out already.