Thanks for your answer! It looks like the Launcher is acting smart about this 
One thing I’d like to point out is that usually people prefer to have some control over large downloaded assets. Normally I’d like to be able to see what versions of the asset I have on my disk, and maybe delete ones I don’t need etc. The automatic behavior is a nice simplification in most cases, but can also be annoying when you want more control.
Not sure I’m right about this, just sharing a thought. It looks good and works for me