I have to say that it is a pretty nice quality of life improvement suggestion for sure. Between dormant projects, or wanting saved project files, or even to go back learning material without having to redownload.
As for a workaround, the problem is with finding something that works that wouldn’t mess with something else due to entitlement checks and login checks. I’m not sure it could be hacked together to be functional without being an actual feature within the Launcher/Engine. However, I have passed this all along to the appropriate teams. And soon as I hear anything back regarding this, I will let you know!