Every time I use Waze, I end up pulling my hair out from all the stress-inducing second-shaving measures. Left turns zig-zagging across the city? What could be bad about that??
The idea of low cognitive-load routing is great. One could take in to consideration "how does this driver/cyclist typically navigate to the point they've requested," and providing a route that augments an already well-worn mental path with something a little better and easier (or faster) as well.
Does Strava take user feedback as an input? It irks me how Maps/others seem to not take elevation, road condition, or general "pleasant-ness" in to consideration when it comes to routing …