Earlier quoted context omitted.
Google Reader: I will forever be salty about how Google killed something that likely required very little maintenance in the long run. It could have stayed exactly the same for a decade and I wouldn't have cared because I use an RSS reader exactly the same way I do that I did back in 2015.
I never understood why noone built a Copycat (like "bgr" -> "better google reader :-D) There would have been a clear change to fill this vacuum? The thing is: I guess they didnt see a good way to monetize it (according to their "metrics"), while the product itself had somehow relative high OpEx and being somehow a niche thingy.
like theoldreader and Inoreader, which explicitly copied the columnar interfaces, non-RSS bookmarklet content saving, item favoriting, friend-of-a-friend commenting and quasi-blog social sharing features, and mobile app sync options via APIs? Or NewsBlur, which did all of that _and also_ added user-configurable algorithmic filtering? Or Feedly, which copied Reader's UX but without the social features? or Tiny Tiny RSS and FreshRSS, which copied Reader's UX as self-hosted software?
theoldreader remains the most straightforward hosted ripoff of Google Reader, right down to look and feel, and hasn't changed much in more than a decade. Tiny Tiny is very similar, and similarly unchanging. FreshRSS implemented some non-RSS following features. So did NewsBlur, but as it always has, it still struggles with feed parsing and UI performance.
Inoreader and Feedly both pivoted toward business users and productivity to stay afloat, with the former's ditching of social features leading to another exodus of people who'd switched to it after Google Reader folded.