Thanks very much for your initial post, very interesting data indeed. My Sony PRS-T1 has been in non-stop daily use since I bought it new in early 2012. It shows no significant signs of tiredness, even the battery is still decent. I've managed to live completely smartphone-etc free thus far and it is the only tablet-like device I have ever owned.

The UI could be better; over time, I have tried out several of the PRS-T1 hacks found on the MobileRead wiki, including rooting it and installing Android. Eventually, though, I always switched back to the default UI, and my preferred way of reading articles, blog posts, forum/HN discussions on it is 1) piping the URL through the Links text-only web browser and 2) saving that rendered page as a .txt file (with Links' screen margins set to a size that is suitable for the PRS-T1). It works really great 98% of the time, so even though I would prefer a more hackable e-reader, the PRS-T1 is my main reading device.

Strangely, to escape information overload, I've started to weigh the arguments for actually subscribing to a paper-printed quality daily. The web is becoming a tiring mess, and with the AI explosion, I expect this to only go worse. In our country, my favorite printed daily decided to go web-only last year or so, but another decent one is still alive, so I'm seriously considering going that route recently. Strange times.