It seems to be a bit of an internet meme, but as another poster noted, the original logic seems to have been lost, and it's now simply cool to quote the meme.

You say plenty of Google services have been killed - and you cite 3. But only 1 of those has actually been killed.

Google Reader was shutdown - this is somewhat personal, as I was a bit lover of Google Reader as well. However, there was 12 months of notice for the deprecation, there were provisions for migration/exporting all your data - and there were reasons mentioned at the time for why it was deprecated. Basically, the writing was on the wall for RSS for a long time before that.

Hangouts wasn't discontinued...in fact, I use it as my main chat application currently (both in my personal life, and at work).

GTalk is basically Hangouts, with with improvements - same contacts, same chat history, same platform. Everybody was basically just migrated across wholesale, and got some nice new features to boot (e.g. group video calls).