I've been getting that from some of the images on slower lemmy instances. You open an image and it loads slowly. Line. By. Line. Never thought I'd be nostalgic for the 56k days.
As far as I know, google doesn't have an official policy on how long they provide security updates, but it has pretty consistently been 3 years after release.
The only reason old versions are still in use is that most vendors release a phone, give it the bare minimum number of updates, then abandon it when next years shiny new model comes out.
I can't type
dnf
without thinking "did not finish." I can't even remember what it's supposed to stand for anymore.