yup, and it's not hard for relays to adapt so they usually just send teh new version, but if the new version has a "replaces" tag you can ask for that event by ID and it has etc back to the first 

 also, i don't think `r` is used yet? or at least not `R` which could become the standard

btw, technically such a scheme makes it a blockchain 🤣 🧱