I have polarizer but i rarely use them, and to add a warming to it, it is too much, some people love to have polarizer and warming or even ND on one filter, fine lazy people, but really i have fun to use some filters for certain conditions, and if some prefer warming scenes, some prefer cooler tones, and as it said, with digital workflow many things can be done, warning or some color effects can be done just ND or Polarizer effects even can be done somehow i can use filters about that only, no need to have 10 filters with me also no need to have 1 filter which has 5 effects to do at the same time.