Used Swype until cancelled. Tried many gesture keyboards and Gboard is best now.

apple products are not popular outside of the north america.

Most Gen X people I know from work (developers), hate to use new stuff. For example, Slack or GIt doesn’t exist for them, and use call/sms and usb/email instead. Some of them learned facebook and stayed on it.

I use it, but I have some games that are not there and only at github/gitlab.

Never heard of it before, but it seems better than just using f-droid. Some of the apps I use are only available on GitHub.

I would say lemmings age are 25 to 45. People in this range are, in my experience, the most technologically educated.
Gen Z is somehow terrible with anything outside basic android/ios.