In short - shutup and deal with it. Is it an extremely mild and barely inconvenient nuisance to deal with different or mixed line endings? Yes. Is this actually a hard or difficult problem? No.
Stop trying to force everyone to break their backs so your life is inconsequentially easier. Deal with it and move on.
Allowing CRFL-less operation intentionally, especially in new implementations. Abusing protocol tolerance is (just a bit) to switch current ones. Should allow relatively gradual progress towards Less Legacy:tm: with basically no cost.
Not every change is "breaking your back" especially if you should be updating your systems anyways to implement other, larger and more important changes.
There will always be tech debt. Always and forever. Burn cycles on one that matters.
Regarding this issue…I don’t think the author is advocating for patching standards. Just consider CR as deprecated and use it only for backward compatibility.
I do it similarly. I don’t convert line endings but any new project uses LF irrespective of the OS and configured as such in the editor.