There are automated cleanups every so often, and if you're ever actually low on space, windows will tell you to run the disk cleanup.
There's no problem or design flaw here. If you want it to run more frequently you could look around task scheduler for it.
Sent from my Windows 8 device using Board Express Pro
That is true. And I'm aware of those things. Tablets by their nature should be more "appliance-like". That, in a nutshell, is why the iPad was able to gain traction when previous tablet attempts didn't. (yeah, yeah, I know many will claim it was nothing more than the Apple reality distortion effect)
Disk Cleanup is something that should be taken care of at the time it is needed, not "scheduled" to run. That's a "desktop mindset".
WinRT needs to be self-maintaining, self-optimizing, and require less frequent updates. I don't want to have to do "system maintenance" on a device that I use for convenience. Given that Microsoft is in complete control of the hardware (Surface) and operating system (WinRT) there is no reason for various updates to drivers and such.
With desktop Windows, it is perfectly understandable for there to be many updates and fixes... numerous hardware combinations can cause unexpected and unpredictable results. But When Microsoft has a reference platform for which to code to, the amount of churn in OS components is sad.
But I know that this thinking is in the minority here.