I don't think I like the idea, imagine boosting a note that in the future can be changed without any kind of warning.
Discussion
You can always boost a given version of a replaceable event. In fact, that is how it should be coded. The boost has a e tag for the version and an a tag for the most updated post. The client should show the original version with a message to update to the latest if the user wants.
I understand, so my opinion is neutral, I am not interested in changing my grades. 🤣🤣