To me it seems like E-readers are more popular than ever. Onyx has been pushing out so many devices in the last couple of years(the newest ones run Android 11 with pretty decent mid or low range snapdragon SoCs, the last lumi2 has 6GB Ram).

Kobo finally got their act together and moved their manufacturing back to Taiwan and started releasing neat devices including a new a 10 inch note taking devices.

Some of the old manufacturers like Supernote have now become OEMs. There are eink phones, eink mobile readers, remarkable and even the new upcoming pine reader, which looks like a bigme device with custom board.