Except that the author of ruamel.yaml:

refuses to use git [0]

refuses to take community submissions (except through Stack Overflow? Seems like a misuse of SO) [1]

and refuses to implement .dumps() [2].

He is difficult to work with, and any time I need to debug code that intimately deals with ruamel.yaml types, I wince.

[0] https://github.com/pycontribs/ruyaml/issues/1

[1] https://yaml.readthedocs.io/en/latest/contributing.html

[2] https://stackoverflow.com/a/63179923/15170511