If that’s something that matters to you, do know that Boox does not comply with the GPL licence.

Agreed! It’s so frustrating when I screw up a build, or realize I don’t enjoy the build I made after investing too many hours.

There were some controversies due to the toxicity of Hpyrland’s community (namely its discord server). See this post for example

Edit: I should have read OP’s linked post first, which actually also refers to Drew’s post.