I came back for DF after leaving at the end of WoD. I used to play a pally healer and loved it.
I tried healing again, and while I was still good at it, I felt so much stress it was not fun at all.
Because of that, decided to switch to tanking instead and just chill.
I've played pretty much exclusively healer for like 15 years. It got stressful during shadowlands and got harder in dragonflight. Fights got more elaborate because they sort of needed to, which means more people don't learn all the mechanics. Which means healers get to pick up the slack. As a healer you can really tell if you're in a good group or not, I think. I'm still just gonna heal or maybe try out aug evoker though.