Shameless plug: I am the author.
It’s not too hard to check for XDG support first and use a few hardcoded directory paths if that is unavailable.
It’s even easier to ignore it altogether, which is what I do. I don’t use “a few” non-XDG-aware things; I use lots an lots of them.
Are you saying that you don’t want to write your software according to the XDG spec, or that you don’t want to set the XDG env vars on your system? If it’s the second that’s fine - apps using XDG work just fine if you ignore it. If it’s the first I’d suggest reconsidering because XDG can make things much easier for users of your software who have system setups or preferences that are different from yours; and using XDG doesn’t cause problems for users who ignore it.
OP’s recommendation is aimed mostly at software authors.
