The speed of the maps roll out is really, really weird. The last time they rolled it out, it was about as fast as they roll out firmware updates. Based on what people are saying here, it would not surprise me if map updates are only coming at a rate of maybe a few hundred vehicles per day. Something is wrong - either there are show stopping bugs in the navigation software itself (unlikely) or there are bugs in the firmware "rejecting" the ability to consistently receive the map update. The only other thing I can think of is that given the size of the fleet and the size of the update, the roll out is so expensive that Tesla is intentionally slow rolling it to save money to help hit financial targets in the the current quarter. Otherwise, I cannot think of a good reason why the slow roll on a map update.