Less features, teens do social ostracization, and adding a non-iPhone into a group chat makes the group chat worse so Android users don't get added to group chats, etc.
The color that changes is the one of the sender on iMessage. If you message an iPhone user your bubbles are blue and over iMessage, and if you message an Android user your messages are green and over SMS.
I can't really quantify what makes ui ugly, perhaps some of it is Newpipe's color scheme. However, if I open Newpipe and then the Material You & M3 Libretube app the Libretube app is night & day better
That's fair enough although I'd argue some desktop environments and Linux distributions are usable very easily. Remember that people like grandma are using "the operating system as a bootloader for the browser" and if they can open Chrome or Firefox they're good.
That being said when writing my response I admittedly had you in mind as the user who simply wanted to save money.
I always try to avoid these because of how they had held users data hostage on their calendar's play store version, glad this happened so there can be a foss fork by more trustable parties. Yay!
The app sadly doesn't appear to be FOSS and thus not on F-Droid, but I did check it out. Streisand effect? Or not apparently it was removed over semantics.
Text messaging market in EU is totally different from in the United States. This is because US texting was cheap always— not so with the EU.