As a paying user it's frustrating how bad Kagi maps are given they're (presumably) paying Mapbox $ for it. Most of the time the search function doesn't work and I've been disappointed enough that I default to Google Maps for anything maps related.
In my experience it's the POI data that's really tough. (As opposed to roads/addresses.) Locally, Google Maps has enough market share that every business ensures that their info on Google Maps is correct. Even Apple Maps hasn't been able to scale to compete.