For me Whey IS real food. At times I will get close to 1/3+ my intake from whey. Other main sources are beef, chicken and milk. To me it is just a tool in the arsenal to meet my macro requirements.
I buy only good quality products. (which believe it or not are often VERY cost effective when compared to big marketed brands) One of my favorites is Trutein which is a blend of whey, egg, and casein...all high quality stuff (not ion exchange..etc).
I also have been using a lot of unflavored pure whey isolate (cold processed, microfiltered). I buy it from NOW in 10lb bags. Just the highest quality pure protein isolates....NOTHING else added. I mix this in with a lot of things. I still buy flavored proteins, but I usually cut them 50/50 or even 25/75 with my unflavored whey (flavored/unflavored).
Anywhey......whey is food to me and I use it as such. It is not only the most bioavailable, but there are also MANY MANY other health benefits from whey. (cold processed and filtered one's NOT ion exchange)