I know this isn’t the type of answer that you want to hear, but I really love my kindle. It may not be open-source but it works and I can upload books to it from my personal collection. And the battery life is much longer than an ordinary tablet.
If you want to have something to tinker with then I have heard that the open book project is a pretty good build it yourself alternative.
How possible would it be, if this lawsuit does work, that yuzu devs could remove the decryption portion of the code and only work on pre-decrypted roms?