I wonder if freeing up those resources also implies that much of the adware Microsoft often includes in Windows might be removed too.
if it's not: I'm skeptical that the gain in resources would be enough.
if it is: I'm skeptical that this OS won't be locked down as much as possible to prevent it to be used for anything useful beyond this specific gaming usecase and/or specific to pre-authorized devices.
I think Microsoft benefits too much from the adware they add to Windows to allow this new version of the OS to potentially be used as an alternative.
If you are happy with the default, then just use the default.
Some of us use the terminal more than any other app, so I like my terminal to be super lightweight and snappy in all situations so it opens instantaneously (I doubt this one is like that though, if it has big dependencies like GTK / Qt), preferably if it does so without sacrificing in features (true color, things like sixel for graphics, allowing to set fallback fonts, maybe font ligatures, being able to set the app-id so my compositor can treat special terminal windows differently, etc).