Actually I work at a printing press, so I know the importance of it lol. A co worker and I have experiment with using manga studio at work, the results was very interesting, but like you said, Adobe is the industry standard.
A friend and I started our own comic/animation studio and we also help out another local studio. Between the two studios most use Manga Studio or use it with Photoshop/Illustrator. But to be fair, we are very small companies and some of my artist only use manga studio because I do lmao. Also comic artist Brian Bolland, Dave Gibbson, and Mike Krahulik to name a few, use Manga Studio.
So it is definitely growing in popularity lol.
I did have chance to try the Surface Pro 4 and iPad Pro out earlier today at best buy. They didn't have the Apple pencil for me to test

It seem pointless to me for it do be that big and still be iOS and not OS X. Maybe it would have been better if I got to test it with the pencil. I was really impressed with Surface Pro 4. They did have a Surface Pro 3 with the Pro 4 type cover and pen to test on it. That was awesome. I would recommend Surface Pro 3 user to just get the Pro 4 type cover and pen, just getting those would be big upgrade.