Well you can see they intend to allow this feature in the future. I mean they have a place for it in their design already. I'm sure it's just a matter of time before it gets implemented.
They just did a big overhaul yesterday to the look, feel and reputation system.
Yes, to be clear: I'm definitely not complaining. In fact, if they never implemented the feature, I'd still be a big fan of the platform and regular contributor. That all said-- and you rightfully point out that there have been wonderful updates in recent days-- is there a WHY to be had? Is there a reason that anyone has publicly stated anywhere as to WHY the feature wasn't part of the initial launch? I fully understand if this is something that just isn't known but I'd be surprised if I'm the only one to call this little detail out and want to know what's up.
I've found no official "why" but I also haven't been looking for it. From what I can tell they have their hands full at the moment making sure the currency stays stable and people aren't exploiting things.
But image is everything!