A couple of thoughts regarding why, as a ham, that I have no intention of becoming a "ratchet jaw" on GMRS.
With the increase in digital ham such as DMR, I would expect most hams will go to/stay with that vs GMRS. From what I know there are about 200,000 registered DMR contacts currently but everyone is expecting that to explode. New radios are coming with slots for up to a million contacts. While you can still be limited to a repeater only having 1 maybe 2 incoming time slots (a lot of time the 2nd one is reserved for say, a local net) you have almost limitless outgoing conversations.
I just bought a new DMR radio as well as the GMRS (I had been away from all things radio for about 10 years) and it is mind blowing what you can do.
Again for myself, this is a much more likely "recreational" format with GMRS reserved for travel and family/non-radiohead situations.