As a long time plex pass user, is there anything there that would make me want to switch? Plex has just plain worked for me for years. mobile apps, everything is just great. Why should I look around?

The cheap-as-dirt meross does, it has an open/closed sensor.

Most openers have a dumb switch interface. A simple close-to-change circuit - I’ve never had one that wasn’t that way. If MyQ is so complicated (serial interface!?) then it needs to go anyway.

lol, just get a dumb opener and a shelly relay or use a meross unit. Super cheap and flawless local control that is cloud-connected if you want it.