...from people who seem to refuse to install paredit or coloring plugins for either? ps lisp syntax ftw, it's a feature!
It’s hard to distinguish whether a line is wrongly indented or not.
That’s very much not my experience. I use YAML regularly and while I’ve had copy paste indentation errors when I look at the offending line it’s always obvious to me how to fix the indentation. The only indentation thing that’s ever given me trouble is embedding YAML as a string within a file that uses tabs.