Meanwhile the maps/data quality is quite good, probably 95% there for the things I care about. I've been able to use it full-time for years now.
At this point if I lived somewhere they weren't great, I'd submit improvements for all the places I went
Apple maps is adequate now, but as a map power-user it's been pretty far from great every time I've tried it. I'm happy they finally managed to get an accurate basemap though.
The only reason I ever use google maps is to search somewhere and copy paste the address into Apple Maps.
Can’t speak towards Japan or Taiwan specifically but it’s been fine in extremely rural Africa, India, Brazil, Indonesia, Bosnia, Australia, etc. Much better than Google Maps in most of Western Europe and America these days.