i just suggested this because i manually change the timescale whenever i load my large projects. it's also useful for when you reload your save on top of itself incase you accidently delete a whole section or something important that would take a lot longer to rebuild than to reload. when you reload, it loads a lot slower than if you loaded a save on top of clear space.
this isn't for the clients, it's for the host.
Why do you even bother making up/guessing such things? It's super easy to detect.
the coding for the loading/saving system is in the base game script (?) so i thought the methods used were unknown for where it detects loading to be finished and posts something in the chat to say so, same for when it starts.