I too have had mine removed under only local anesthesia, and fairly recently at that (in my early 30's). It's interesting to see some people say it was a horror show while others said "It wasn't so bad", since I've experienced both!
The reason why I finally had my wisdom teeth removed, was that I had one of them in my lower jaw, that was growing in almost sideways into the molar in front of it, causing a large abcess in the tooth. My dentist was surprised it had never caused me pain before this (I had spent a few years bouncing around, and hadn't gone to the dentist for years, so the fact it got so bad was likely entirely preventable...)
Anyways, because of the way it had grown pushing into the other tooth, the roots of the wisdom tooth were very curved (not quite fishhooks, but close!), so the procedure took a couple hours, while under only local anesthesia, where I could hear and fell him drilling, and chiseling, and digging in my jaw to remove the tooth in pieces. At one point in the middle of the procedure, he needed more images to see what was left, and left large metal pins in the holes from my roots as reference points of how far he had gone into my jaw so far. He gave me the warning "You really don't want to bite down while these x-rays are done", hah! Needless to say, when all was said and done, this was a pretty painful recovery, and still had bits of broken tooth root and bone pushing out of my gums for a few weeks after.
On the other hand, when I removed the wisdom tooth from the opposite side of my jaw, to keep things even, it had grown in straight, and was a very simple procedure where the tooth came out in one piece, and I had very little pain in recovering.
Everything had healed up beautifully now, and the dentist was able to save the abcessed molar, but man, I don't want to go through that again ever, and I can total understand why some people elect general anesthesia for such a procedure, since it really is a crap-shoot on how "simple" of a procedure it is. General may have its risks, but I'm sure people being scared to ever see their dentist again comes with risks as well!