In each case I'd say no. They all list different reasons, and none of those reasons were "we're doing it because everyone else is".

It's what FOLLOWS that could be bandwagon. Because you know someone will start using the fact they switched back as a reason why we all should do so... which honestly is a really crap reason to do anything.

There are legitimate reasons for doing things. "Everyone else is doing it" isn't one of them.