When I loaded my sim this am, I had a message in the sim toolbar that I would have to restart my sim, as the MSFS2020 stuff was being enabled. I did so, and found a FEW 2020 MSMP aircraft in my hanger, but nowhere near all of them. Half the Carenado planes are still hidden in the Cessna C-170 "configure" page. They can be brought up and flown, (I flew the C-337H) and most everything worked. When you choose one, it replaces the C-170 in the list. More of the Reno P-51s showed up, but I have not loaded any of them, yet. My big concern is that I paid for the Premium Deluxe Package, and nothing but the Basic has ever loaded. Each of the upgrade packages are listed as "Disabled." I flew around the San Diego area, where I grew up, and it is a mess. The two houses I grew up in have never had a tree in the yard, they are both almost obscured by trees. The San Diego harbor is inundated with ocean going tugs, some on top of each other, and most of the pleasure boats and piers are underwater. A couple of the AI airliners are on their tops spinning around endlessly. One thing I did notice right away is that I could fly anywhere over the Mission Valley and downtown area without a single stutter, with my settings on ultra. Getting a steady 55-65 fps.
I had to uninstall and reinstall my sim Friday after the update trashed it again, just like it did after the first update. Luckily, no waiting this time. Reinstall took about 10 minutes. I haven't spent enough time IN the sim to see any difference after the updates, but I don't really pay that close attention to it, I just fly around the places I know.