I have seen teams actually do the Scrum-according-to-the-textbook, but those are rare. Most companies are just doing whatever their managers think is a good idea, and they call it "Scrum".

Ironically, the last time my team was doing Scrum-according-to-the-textbook, it was a decision of the developers... and then the higher management told us to stop, because the entire company decided to switch to "Scrum" (as in: endless meetings with managers present, no retrospective, but we call it "Scrum" because it sounds like we know what we are doing), so basically we had to abandon Scrum in the name of "Scrum".

My conclusion from this experience is that Scrum-according-to-the-textbook never happens as a top-down decision. The managers have strong ideas about how things are supposed to work, and they are unwilling to change their ideas, although they may agree to rename them to "Scrum".

I actually get the real-communism-has-never-been-tried vibe from people who say "scrum sucks, agile is the good idea". Scrum is simply what happens when Agile meets corporate reality. Make "agile" a popular buzzword among the managers... and soon you will see people complaining that agile in practice means endless meetings etc.