I'm amazed at how quickly 1x took over the trails. Anyone riding a 3x MTB is obviously a dinosaur. That represents a lot of sales in the industry.
I get comments from some about the road triple on my '83 Trek 520. I actually agree--for me a 2x works better, but no thanks to a 1x. And I'm not going to change just because of current fashion. I'm old enough to be a retrogrouch.
It does take some skill to adjust a triple FD correctly. Once you have that skill, it's very simple. I'm surprised/dismayed at how slowly some fellow volunteers I coach at the non-profit shop gain that skill. And nearly every bike we see has a triple.