Can we do asynchronous map downloading?

[ChillerDragon]

Sometimes I am annoyed by how long a map download takes. Especially if i just wanna text someone. Or vote another map or stuff like that.

Can we send the "ok i know the map let me join straight up" msg to the server. And then put in some placeholder map thats wrong but at least the user can chat/vote etc. And then in a separate or even better same connection start the map download process. Could show some in game loading bar and then reload when done. And on reload it gets loaded from downloadedmaps/

[ChillerDragon]

something easy that should be done for sure is cl_never_download_maps 1 which always sends "yes" i know the map and then falls back to a dummy map if it cant find it.

Then a user can always join all servers and use the chat and stuff. And then start a second client to initiate the map download progress.