Yamaha has a new version of the Gen II CCT that replaced the one that was originally installed in 2014 and up bikes. The most recent version of the automatic CCT is 2BS-12210-91. I have one sitting on my shelf waiting to be installed, as soon as I schedule my next valve check. I'm a decent home mechanic and a fairly decent hobbyist fabricator, and I've been comfortable doing things like removing the entire front and rear of the bike, rebuilding brake calipers, forks, replacing bearings, etc. But for some reason, removing the CCT and installing a new one intimidates me. Valve clearance checks are the same for me, though it that case, it's not the clearance check that creates the issue. I'd be intimidated by having to change the shims if the clearance was out of spec, which means I'd have to button everything up and take it to the shop just so they could disassemble it again.
I'm sure someone has had a Gen II CCT failure; it's a mechanical part, after all, and at some point one will probably fail. I can't specifically recall someone on the forum reporting one, but I could have missed it or forgot it. I don't believe the Gen II units have anywhere close to the reputation that the Gen 1's did, and even with the Gen I's, it's still really hard to tell how common the issue is. Nevertheless, my 2014 is coming up on 80,000 miles with the original CCT, so the next valve clearance check sounds like a good time to have it replaced.