Maybe I just don’t know what “parameter” actually means. I think of it as a variable that can change on each invocation of a function. So from that perspective both “parameterized replaceable events” and “replaceable events” can be thought of as outputs of a function where the parameters are content, tags, pubkey, etc. So it kind of confuses me that one is called parameterized and one isn’t. I would say one has a stable address and one doesn’t.