Thing is OS is becoming so much less relevant with the browsers and mobile - what's the end goal here ? Even without admin access they can't gate keep you like iOS can because iOS mandates the browser engine and won't let it become powerful enough to circumvent the app store - Microsoft can't ever really do that with Windows and with things like WASM and better APIs I suspect web is going to keep growing as an app platform.

So what's the play behind this lockdown ?