EDIT: I looked back in my emails and Twitter DMs and it's been 25 months at this point. So "approaching three years" is not accurate.
Edit: Also want to add that it has been two years since my parents moved in. Went in to Waze Map Editor and added the road myself, so their turnaround time was instant. Apple Maps took 9 months, like I said, but Google Maps still has no info on the street despite having all the houses in clear satellite view.
It did take Google a few months to add my complex. I'm not sure what an appropriate turn around time would be on something like this. But I do think it's less than "years".
It's not like it's some street address thing, they are missing a whole town.
In general, Google still has better POI data than Apple Maps in the UK, but the gap has closed a lot in recent years.
Whenever someone needs to come to my house I need to ask them to use Google Maps. The challenge from that comes from less techy people who don't know the difference. Many people just know their phone has a "maps app". I will admit, experiencing that more closely (how less technical people interact with their phones that is) was interesting fwiw.