Ask amazon and Kobo to open their system if it's so important for you. The devs have probably more interesting things to do than playing wack-a-mole with a multi-billion organisation

I'm not knocking the devs for the choice to target open hardware, only remarking that that choice signals the project is for hackers, not regular consumers.

I mean, a) regular consumers are just gonna buy a Kindle, do nothing with its software, and only buy books from Amazon. But also b) the way a lot of these hobby things expand is that if they get some market traction, someone starts making and selling pre-assembled, retail-friendly versions of the thing. Look at wacky keyboards, for instance: Used to be that you had to solder your own weird ergo split, now there are companies like ZSA and Keebio that'll make really nice versions as finished products.

I would say that there is no such thing as firmware targeted for regular consumers. Regular consumers do not know what firmware is.

I am still disappointed that there is no kindle sized hardware that this can run on, but I think that has to do with manufacturers rather than firmware developers.