I have the remarkable and the main reason I don't use it and use an android tablet (with a normal screen) instead is because of the remarkable's bad software support; can't sync documents and notes securely (e2ee) using standard tooling.
Put money in supporting mainline linux distributions and I will buy this in a heartbeat. Many would.
I am only using android as a compromise because it can run the bare minimum software I need and I couldn't find a similar device that runs standard Linux.
Unfortunately, Google appears to be adding new limits to what software on Android is allowed to do with each update. I don't think android will continue to be a viable option for me for much longer. Standard linux support is likely going to be mandatory.
Whether it's from daylight, pine64, framework, or any of the other OEMs working in this space, I don't care. I'll gladly pay anything for a good tablet that does what I need it to do.
Put money in supporting mainline linux distributions and I will buy this in a heartbeat. Many would.