This list can't be serious. Is there single thing on this list that was genuinely killed by Apple, and not just outdated or moved to be a part of other software?

I'd consider the functionality Aperture held to have been killed. I used it for years after 2015 due to a lack of a functional replacement that wasn't a subscription.

It still find myself missing what seems to be basic capabilities while using Photos.

iphone mini. sure you could argue nobody wants it. i agree most other things there were just old, renamed, folded into sth else or obsolete etc.