Just piggybacking on what Robin has alluded to. Ripping 3d models from Google has been around for a while and it doesn't seem that complicated so anybody can do it. The problem is that the ripped model is not "game ready" as is. Ideally it should be optimised by cleaning up the mesh, combined, and baked into one single material. I doubt anyone who has released those quick and dirty Google models have done this (or knows to how to do this). I've downloaded the Auckland scenery and had a look and it's pretty brutal. Performance wise it seemed ok but whether that will still be the case when this group expands on the coverage area remains to be seen. But I guess it's better than nothing for the time being.
Having said that I actually love photogrammetry scenery in MSFS A LOT. They just look awesome from an altitude. No Manhattan scenery in FSX/P3D looks anything close to the default MSFS Manhattan. It is simply not humanly possible to populate a city like that. The only problem is that the geometry/texture tends to be skewed if you go up to them too closely. This is not an issue with the secondary buildings but it can be quite pronounced with skyscrapers.
I've looked at Google Maps and Auckland is actually quite well covered in terms of photogrammetry. Data is obviously not up to date (about 7 years old???). What I wouldn't mind seeing is someone import and do the entire CBD in photogrammetry as a "freeware base" and we replace/supplement the "landmarks" with custom built models. Manukau is not covered by photogrammetry in Google so this will have to be built by hand. The same concept can apply to Wellington/CHCH.
BTW I'm the "bloke" mentioned. I decided to make a HD Sky Tower when I saw the default Auckland in the MSFS release. At this stage I'm doing this more or less as a study project for myself as I attempt to learn about new modelling techniques in MSFS. If my understanding from the SDK is correct the new sim favours geometry over texture which means we do not need to worry about poly count too much like the old days. This is because modern GPUs can chew through millions of triangles without breaking a sweat. The model you see (on my FB) is very accurate. Each structure is modelled in 3D (current poly count about 20k - the final model may be double that if I model all the antennas

). This is a total overkill for sim use but I think it will pay dividend for me down the track. What I haven't gotten my head around is PBR (I've read on it and understand the principles) and how do I design my texture sheets around it. In some way it should be more "straight forward" than before as we no longer need to "pre-bake" shadows or do "night textures" as lighting is based on real dynamic physics. I think the Sky Tower is perfect for learning how PBR works as it has 3 main materials: concrete/glass/metal. If I can master this I will be able to do any modern buildings/airport terminals.
The long and short is that this is very early stage for me and given my real life commitments (work + wife + baby) I can't say when this model will be finished. But I promise that it will be DOPE. Feel free to follow my FB re progress.
My hope is to finish the Sky Tower then turn my attention to Manukau CBD to complement the upcoming Flightbeam NZAA.
All in all very exciting times ahead for Kiwi simmers

BTW sorry about the long winded random rant