Jonjey you're in real danger of misleading a lot of people who come here for solid advice. I understand your point that you feel that members here feel that axolotl care is set in stone and I get your point that axolotls might live in higher temperatures at some point, even potentially in the wild.
The point is, other people come on here looking for advice and they tend to read what they want to read. As soon as someone says "I know someone who keeps their axolotl at 80 degrees" that effectively will give someone the go ahead to do it because it's apparently, fine. It doesn't matter that you're following that with "but it's not ideal" or that you personally don't do it.
You previously started a thread about housing axolotls with another species and when you were advised that it wasn't a good idea given that they have different temperature requirements you just shrugged that off with "I wasn't going to do it, I was just asking" and the thread ran for 3 pages of you keeping the debate going.
I genuinely don't know if you're trolling or not. You've used the "it won't kill them instantly" argument before. There seems to be a trend of skewing advice which is tried and tested and is laid down for the optimum living conditions for your axolotl, not for what the owner would like, or what's convenient for the owner. The skewed advice is usually followed by "I don't/wouldn't do it though". Why even suggest or ask about housing axolotls in conditions that affect their health when you wouldn't do it, or don't do it?