When I install a new application, I generally run it immediately. Having the new indicator might be nice to help find it - they don’t always drop into the menu where I expect.

I agree, I can’t see why it upsets the author so much. “You’ve installed a new app, here it is.” “YYYEEEAAAARRRRGGGGHHHHHHH!”

I “grew up” with Slackware, so I definitely understand the dependency issue.

I like flatpaks (and similar) for certain “atomic” pieces of software, like makemkv. For more “basic” software, like, say, KDE, I want it installed natively.