I agree with you, and in my opinion Reader was the most used and most useful product on that list. Most other discontinued products were indeed underutilized (for various reasons) or outpaced by their competitors. But TBH, there are some products I wouldn't mind seeing on that list (Allo being one of them).
If you liked Google Reader, please give Inoreader a try. It's a nearly perfect clone but with useful features like filtering and following Twitter feeds.
> Why would anyone hate it apart from the fact it is yet another chat application.
It's not that I hate Allo, I just prefer Hangouts. That might seem orthogonal, but a part of me worries that at some point in the future Hangouts will be deprecated in favor of Allo.
Allo is in maintenance mode. The entire Allo team has been moved over to Android Messages. Hangouts is also in maintenance mode. The 'Hangouts' branding has been repositioned to their slack-type productivity tool. Like Allo, what you know as Hangouts is dead.
