I could do City, Region, and Country stats using exactly/only what I have right now.
For example, you’ve completed 1,001 of the 117,735 streets in Michigan … almost one percent!
Of the 3,842,413 streets in the US… well, I accidentally the whole thing while trying to brute-force that count. 
I’m sure there’s a more elegant way about it, if I spent time thinking before typing.
The idea of formalizing around counties also existing in CityStrides sounds brutal, based on my experience with cities so far. 
This thread also touches on the idea - CountyStrides - but I think in a way that’s more geared towards having a fall-back to the county level if the city level hasn’t been mapped in OSM for whatever reason.
I’m not saying “no”, I’m just crying a little on the inside 