Many client's now come with their iphone loaded with a list of colors from the internet thinking they have found the perfect colors. Photos aren't accurate. The only way a color is going to work for you is if it goes with your materials.
I have seen colors look beautiful in one space and not work in another. There are many factors for this. Light plays a huge role in how a color 'reads'. Yesterday I saw Paper White by Benjamin Moore in a master bedroom. It had so much color for an off white. But, it was a south facing space and I suggested the color to be changed. It was too cold for their bedding.
The ever popular Gray Owl read baby blue in a client's hallway because of their skylight.
So, when you read all the blogs on the 'best white', why do they all have different undertones? If it's the best one, they shouldn't be from different color families. It is only best if it is best in your space. It is only best if it 'works' and no one can say that without knowing your light and your materials: like your kitchen or bathroom counter, your backsplash. Some popular whites can make your backsplash read yellow. A horrible mistake!!
My favorite whites are clean of any undertones. Hardwood Putty by Benjamin Moore. And, Mainsail from C2. Interior only! These would blind your neighbors if used for exterior.