I use yaml for over 15 years now and never had any issues. Iam a rubyist, naturally that was how i first met yaml and since then I really like it.
Also with homeassistant I was "forced" to write a lot of yaml by hand and also never had real issues. Maybe its because emacs handles writing yaml fine. Anyways. I like yaml.
Hopefully most distros' default emacs installs do the right thing these days but it's not something I've checked because these days pretty much everybody already has a setup that works for YAML because of how prevalent it is.
(I like YAML for just-about-human-editable data structures but then people try to text template it rather than actually treating it as data and then I want to cry)