Here is what I think about that. Let me start from seemingly unrelated factoids. And thus manipulate you to the conclusion.
Update 2016 Feb 01
In all of my gullible-ity of one seasoned M£FT guinea pig, I assumed the UAC issues have somehow been solved as WIN10 progressed through numerous updates. But no, it was not. Is there no end to this?
I am thinking hard, and …. no. I can’t find an excuse for M$FT Windows 10 decision makers. Yes, I have read good posts for grown ups on this issue, but still I am not able to think of an good reason for this kind of thinking. Can you?
Update 2015 Aug 29
I am doing my best not to get fed-up. But this bellow is a fundamental confusion. Not a strong delivery.
Rant Reason Explanation (RRE): Windows App Store has no reason to be hidden from anyone NOT having Microsoft Account. Technically one needs to login with Microsoft Account for the purpose of App installing and arriving to her desired machine. But this has nothing to do with browsing through the shop. This is like asking for a possession of a valid credit card on the entrance doors, not at the till.
Thinking of which, this is standard practice for M$FT wherever you see the “FREE” sign above the entrance doors to any of the M$FT virtual kingdoms. Like Azure fore example. IT is all free, as long as you provide a valid credit card beforehand.
And the key point: This kind of fundamental solution and decision makers “thinking” that must have been done behind it, is now apparent, after the new OS is “delivered”.
One of the genuine Windows 10 setup screens
2015 August 13
Windows 10 is simply not ready yet. That’s the bottom line.