"WRT" doesn't bother me, likewise "FYI", "IMO", "YMMV" and a host of others. They're legit abbreviations.
The ones that get to me are "U" instead of "you", "4" instead of "for", "2" instead of "to", and the like. Those are beyond the pale, IMO, because they don't represent the thing they're abbreviating. They're just plain sloppy usage, trying to be hip and cool, and sounding like an idiot.
I agree. We’ve adapted language to the digital world better in some instances than others.
(Didn’t ‘U’ and ‘4’, etc., came into use largely through cellphone texting? I never used those terms, but until I got a larger phone, I hated texting and would type as succinctly as I could - and I have small hands and slender fingers...)
My old mentor from the Bell Telephone Laboratory told me, “One man’s mnemonics are the other man’s hieroglyphics.”