Comment by Twirrim

I'm not sure if they ever changed away from it, but early generation kindles were running an old version of embedded java (4 I think? Pre-generics), that was already quite painful to deal with, with the team having to maintain their own forks, build tools etc. because nothing supported it. Reportedly there wasn't a way to actually upgrade the version either. While I wish they'd support them longer, I'm not surprised that they've finally decided it's not worth it.