This lines up with my experience. About a year and some change ago, it was undeniable to me that Apple Maps had become markedly superior at directions than Google Maps or Waze. GM/W would routinely just be very off and give me the alert to make a turn as I was passing it at speed. Apple has made one howler in the past year or so, directing me to a closed road — recovering from that took about 45 minutes because it was in rush hour at a bad spot — but I looked afterward and I’m pretty sure Google Maps would have given me the same route. Apple Maps’ directions for which lane to be in for an upcoming stoplight or exit are also far more accurate and helpful for me.