I tried to switch back this past fall when I moved to the city. I wanted to be able to get directions using Siri. I thought for sure they had worked out its kinks by end of 2016, years after its initial release.
I lasted less than a day. It had no idea where I was at times, even on major roads. It would more often tell me to turn after the turn than before it.
I don't know anyone who has used both Google Maps and Apple Maps who would call the latter "quite good", so I suppose it's relative. If all I knew were Apple Maps, I'd probably agree with you.
I refuse to use Apple Maps on principal. I prefer Waze, and use it. Yet when I click an address link, I get directed to reinstall the Maps app, and it won't let me open the links in the map of my choice.
I agree that it's virtually on feature parity and quality with Google Maps, including getting _really_ good at adjusting directions based upon traffic patterns in real-time...at least in the US. When I travel internationally, even in a big/populated locale like London, I just don't quite trust it just yet.
It's a shame, because on iOS Maps is a pretty polished product and the team deserves credit for where they've come.