I suppose I meant new acronyms. It's certainly not impossible, as you have pointed out, but I don't have high hopes for people. Hell, most people can't understand how REPLY ALL works. On the other hand, if they were using an email client and it literally would not let them type a long response, that would be foolproof.
Could you elaborate on "developed organically" and "many years"? It seems apparent to me that at some point, someone used the word RSVP for the first time without explaining what it meant. Perhaps by "developed organically" you mean "it happened so long ago that it seems natural now?"
No, I do not mean that it happened so long ago that it seems natural now. I mean that no one ever had to force it unnaturally, unless in the context of a larger and stricter school of etiquette such as the court of Louis XIV in France.
The meaning of the term RSVP was precise and encapsulated well before the word "RSVP" ever came into being. "Please Respond" is a common and well-understood expression for an invitation and RSVP is merely a shortcut and clever reference to specific school of French etiquette that used the phrase "respondez s'il vous plait."
In contrast, VSRE encompasses both a new form of etiquette and a new acronym that doesn't reference anything special.
