When you thought Microsoft could not get any stupider, here is what they are announcing (emphasis mine) :

extrait : "Windows Sandbox: an isolated, temporary, desktop environment where you can run untrusted software without the fear of lasting impact to your PC. Any software installed in Windows Sandbox stays only in the sandbox and cannot affect your host. Once Windows Sandbox is closed, all the software with all its files and state are permanently deleted."

The sandbox is completely inoperent actually. Even Notepad stores a bunch of settings (in the registry). With the sandbox, notepad will start in next session as if it was running for the first time. Ever wondered how an application works ? Application certainly need to store a lot of settings : settings, license file, work files...

By preventing to do the very thing that an application must do, this is the perfect recipe for allowing nothing but the stupidest apps out there to run perfectly, and every time.

Indeed!