I haven’t had any issues with the 2016 tb version. But then that’s only 1 data point! Actually it’s the best Mac I’ve owned by far. The keyboard has been a big improvement as has the trackpad, screen, speakers, build quality and switch to USB c, reduced weight and size, etc. I upgraded from the redesigned 2012 which had a lot of glitches. New designs always take a while to work out all of the glitches. But generally I don’t see a lot of threads on bad keyboards. So I suspect this is fairly isolated.