AlanOfTheBerg, I do see your point but the problem is that there are very few people traveling from where I live to where I work. Obviously I will share some parts of other people journey and at any given moment Waze may be able to calculate a good route but that gives me no insight into trends over time.
Say its Sunday night and i need to plan the morning activities. I can look back through my route data and see that Monday, it typically takes me 10 minutes longer to drop my kids off at school and 15 minutes longer to get to work from school. That tells me I need to schedule a meeting 30 minutes later than I would if it were Thursday. Furthermore, I could use that information to determine when I usually make it to work. Then I could let people know things like, I usually get to work at 9:45 on Mon / Wed, 9:30 on Tue / Thur and 9 on Friday.
I am the type of person who doesn't just want the answer, I also what to know and understand why the answer is what it is.
I also like to know how long it takes me to get places and to figure out how best to get somewhere. It makes the freaking tedious morning drive a little less so if I am actively trying new route and see how they compare to other routes.
Having access to route statistics can be useful in other ways too.
I guess it's a moot point anyway. Waze can't do what I want so I will have to look for something else or build it myself.