Out in the general world of home/hobby and small shop mig is the workhorse. I used them in small job shops, never on a real construction site. Lots of tig on nukes. All the structural lo hy, every pipe tig root, both carbon and SS, smaller stuff all the way out. Zillons of socket welds.
I had the outside corner of a SS socket fitting crack on me at a nuclear plant. came like that from the supplier. I dint notice it at first but the more heat it got the bigger it got. Told the foreman who got the white hats. We were shut down for 3hrs. They pulled every fitting with the same number out of the supply room. Went and inspected every one that was already in the field. They were drain lines. Nukes don't play around. You make sure every weld you do is the best it possibly can be. I had to test for 5 days before I got put in plant, on that job