odd thing about MSFS imagery

Maybe you folks here can help me on this one.  We all see the world as MSFS streams 'bing' imagery into the sim.  However, I recently flew over an area that shows building that have been gone for 10 years, no big deal as I know this can be the case.  Once I closed the sim, I wanted to explore bit more that area and I opened Google Maps, sure enough this shows a much more current condition - ok, no surprise.  I also was curious about some the building facades so I opened Bing Maps to get the 3d view.  I expected to see what I see in MSFS, strangely enough, both Bing and Google were very much in sync and quite current.  So, at this point I go into my third map package, which is the MS Map app, and it was in this one that I see the 10 year old stuff that I saw in the sim.  I am aware that there may be a lag between Bing and MSFS processing, but in this case I believe that the area that I am looking at has been Bing updated a least twice in 9 years.

Question: MSFS does not appear to be using Bing imagery everywhere? and for those that have the MS MAP app installed, where does that imagery come from?

PS: area in question is Kaiser Hospital at 2500 Merced St, San Leandro, CA 94577  (I worked on this project for about 4 years)

Thanks