Correct. I'm also still using my S3, thanks to the folk at Cyanogenmod. It's on it's third battery, and still does everything I need it to. In fact it's better than ever, I now have Permission Blocking, AdBlock, Greenify, and absolutely no Samsung bloatware. I have a nice big SD card full of lots of music, it's great.
I rarely go anywhere where there's a 4G signal anyway, so that just isn't important. It could maybe do with more RAM, but I can manage. I'm not planning on upgrading until this one has reached end of life. Sweat the asset!
I guess that Samsung (and the others) have realised that removable batteries (and people like me) were a problem to their sales expectations. But as long as I continue to have a functional phone with a removable battery I'm happy for it to remain their problem, and not mine.