I always seem to inherit the most awfully managed NTFS systems. I really need to migrate our current system to ZFS or BTRFS, but I don’t get paid enough to deal with that.
Plus the company owner is someone who was middle management in on an IT department for years so he’s always rambling on about some stupid proprietary system he remembers from 40 years ago at a sales conference.
I’ve had good luck with Pocketbook. They all run on a busy box kennel and can be pretty easily flashed. Since it’s just running Linux, you can also just load in alternative interfaces as apps that just run on the existing kernel