Carlos from Spain:

For some people the PDK offers so many advantages that they have no interest in a manual in any scenario,  for others the manual is the only option that gives them enough involvement for the driver experience they want, and for many it will depend on the particular car if they prefer manual or PDK on it, the type of driving it will be destined to, if they have one or several cars, etc. Or even a matter of wanting a change again, after having one tranny for a while you may way to have the other and switch between the two every other car.

+1