There are some techicaltechnical situations where I prefer to use the viewfinder on a DSLR, for example with totoo much light arroundaround me... It it is hard to see the viewfinder in some light conditions, for example with the sun on a beach.
A more specific technical situation is speed of response. You are seeing the moment as it is happening. A blink of your subject, a racing car. If you are seeingwatching the display probably the car is no morelonger in front of you... I know.: It hapendhas happened to me some time.
But in my opinion, the most important thing is to stay in touch with your subject.
You can see a sunset above the clouds on an airpaneairplane, just thru dethe window. You know they are there. You can eaveneven touch the cold window. But imagine that the next generation of airplanes just put a video display as a window...
Yes, on a camera you know the thing is there... but it dosen'tdoesn't feel the same.