The point is that you don't push an irrevocable update to a critical service, one of the few things that is somewhat likely involve real-life, actual physical safety, out to millions of millions of users. Yes, maybe when it was brand new, called "experimental", and people hadn't come to trust it, GPS/location stuff could be spotty, but the bar is raised now. While we can all respect that development takes iteration, you just don't force people to use your stuff until it's up to expectation, even if those expectations have been made much higher than they were a few years ago.

A few bugs here and there is understandable, of course. Any honest person looking at the situation knows that Apple's Maps app was not just a matter of a couple semi-serious bugs; it was practically unusable for a large portion of people, and it's an application where unusability could create real safety issues. Completely unacceptable handling on Apple's part. They could have pushed it as a "beta" or "preview release" or other "help us work out the bugs" thing, but they decided to force all users to engage it as their only maps experience. Apple is responsible for this severe oversight in judgment.