For sure there will be still addons required. MSFS is not a simulator where you will get worldwide high end airports. Default is better than FSX default, but still default. Even the deluxe default airports will require addons.
Cologne is for us an important POI. But not for other. Asobo can’t model worldwide every POI. Most is still autogen generated by AI.
And it is based on bing satimages. So go to bing and you see what you can expect in different regions (age and quality of satimages).
So at the end MSFS is still a giant step and a great future sim, but we will still have to buy addons.