I use a combination of both digital and traditional. For a long time, I tried to force myself to draw exclusively in digital, in part because I had no idea how to properly scan my traditional art (so it ended up looking like crap on screen) and in part because it was "what all popular artists do". However, despite all my attempts, I could never get myself to draw directly in digital, so I'd usually sketch things on paper and then do the lineart/coloring digitally. Still, I found myself spending AGES zooming in and trying to define all the tiny details, thus wasting a lot of time, more often than not ending up with something I didn't like anyway. This was especially true for cartoony drawings, which I could never seem to get to look the way I wanted them to no matter how many times I tried.
Then I finally managed to find a way to "scan" my traditional drawings without losing too much details (the trick apparently was taking photos, rather than using an actual scanner) aaaaand... decided to switch back to traditional, lol. I'm WAY faster with it (seriously, the coloring of a page with markers takes me... what, two hours, compared to the 4+ hours I spend on Photoshop?), I spend a lot less time nitpicking over all the tiny details AND I can get the result I want much more easily. Yes, it costs more, yes it's harder to store stuff... but honestly, it's a price I'm willing to pay, if it means being able to work faster and with results I don't hate.
I haven't given up completely on digital art: I still do it from time to time and now that I got myself a Cintiq and an iPad Pro I find myself enjoying the process a lot more than I used to (up until last year, my only tablet was a simple Wacom Manga with no screen). But yep, unless some sort of miracle happens and I stop being a freaking perfectionist at some point in the future, for my comic I'm going to stick to traditional art 