alt Hacker NewsThe Kobo Glo, released in 2012, is still getting updates to the latest Kobo firmware version.
In fact all Kobo e-ink devices, except the Kobo Mini, wifi, and the original one, are still getting firmware updates.
Their android-based tablets with IPS screens are all discontinued though (as far as I am aware).
This is more than Amazon ever did. They haven't updated the firmware on some of their devices that are officially "supported" in years.
Not to mention that those devices all support regular EPUBs out of the box, and so you can still put new content on them today.
Of course, you'll get a bit more out of them if you convert your EPUBs to KEPUBs with Kepubify[0], but the point remains that Kobos are supplemented by their cloud/connected features, not inherently dependent on them.
0: https://pgaskin.net/kepubify/