I think that the number one reason to own a Porsche is to enjoy it the way
you want it. I am a good example of what VFR750 was saying: when I discovered Porsche in 1988 I fell in love with the car and said "someday...". Fourteen years later when I could afford one, I went back to the kind that I first discovered: Carrera G50's. Unless you are owning one for investment purposes (which is not wise 95% of the time), get what you want, do what you want, enjoy it. Remember that he who dies with the most toys still dies. But I digress.
Having said all that, look at history. The older a car gets, the more people desire factory originality. In the last 6 years I have watched at the local car cruise-in of 5-800 cars. Super hi-performance mods, wild customs, and rat rods come and go. Fads if you will. In the meantime, a car that is all factory original (even restored) always gets attention because people want to see what it was really like back in the day. I see the same thing happening with 356's.
What's the next fad? Don't know. What I do know is that there will always be a place for clean original cars. Am I shaded by my preferences? Probably. But hey, remember where I started. Go find what you love and enjoy it. Don't worry about what everybody else thinks.