This is 10 year old ebook technology for the sake of being "open", when one can just install KOreader on a Kobo.

KOreader fixes nearly all of the annoying bullshit in Kobo's firmware, which frankly, is terrible. The UI is poorly organized (why the hell is night mode so hard to get to!?), crashed routinely (just like it did ~10+ years ago...), and page changes are painfully slow, barely any improvement from the much older Kobos. It also provides support for remote libraries and a slew of other features. The UI isn't very clean, but it has a ton more features.

I've never understood how my much newer Kobo is just as slow as my first Kobo reader which was 10+ years ago, or why both of them rather frequently hang and have to be power-cycled.