I've gone through this shit back in the days of MSN Messenger, ICQ, and AIM. I didn't exactly switch then, either. Instead I went with Trillian and later Pigin to just use all of them at the same time under one account. Same thing is happening now with everyone I know on different apps. Except there isn't anything like Trillian or Pigin for any of 'em.

Effort is not really a part of the equation for a lot of people. Usually it's just "I don't want to switch".

It's not a circlejerk. It's called the network effect and it's a legitimate phenomenon.