Good e-Reader poses a market question: as Amazon trims legacy Kindles and features, do dissatisfied buyers migrate to Kobo, Onyx, or other Android e-ink tablets instead of staying in the Kindle walled garden?
The piece doesn't pretend there's a single answer - ecosystem lock-in, file formats, and price all pull different ways. For readers, it's a useful frame when your device hits end-of-life and every replacement option demands a new compromise.
(Shortened and summarised to avoid devaluing the source)