The same WASM can run with different parameters regardless of where it is hosted. But whether to put it in the event body or on blossom I don't know what is best. I think having it on the note is good because it acts as a natural size limiter and is slightly simpler to implement, reduces errors, makes it easier to reason about, reduces the number of errors and moving pieces and dependencies. But I can also see the other side of the argument. It's a fine line to thread. For example: why wouldn't this note's content be put in a blossom server and the event be just a hash to it?