There's also the recently-released LilyGo TTGO T-Watch, which might not quite meet the most rigorous standards due to its ESP32 core but is designed from the ge

There's also the recently-released LilyGo TTGO T-Watch, which might not quite meet the most rigorous standards due to its ESP32 core but is designed from the get-go to be hackable. It doesn't seem like a stretch anymore to imagine a world of perfectly nice hardware that isn't locked down.