Here are a few! There was also a whole wiki, RemarkableWiki.com, for a while where users shared technical tips and tricks. It’s not up at the moment and I’m not sure if it’s down permanently or only temporarily. My experience has been similar to @blusterydayve26@midwest.social — I bought the device because I liked how user-modifiable the software was, but once I had it in hand I found that official development was moving briskly enough with new features and UI improvements that I’ve never really had a reason to mod it. I have SSH’d into the device to set it up with a few of the trickier WiFi networks in my life, though, and can confirm that it’s a breeze.