Around a year ago I would have said it wouldn't matter much.
But after some stuff happened and I ended up on very strong meds (Morphine and some other stuff), it went in and affected my brain quite a lot.
First I couldn't read/Use the computer for weeks.
But, when I finally got a bit better again, and was able to enjoy manga and webcomics, I just... Couldn't enjoy manga as much.
There was too much information crammed into too small pages, with too much text just staring me in the face at once.
Whereas the scrolling pages were less information all over, making it easy for me and my stupid brain to enjoy and read with ease.
Even now, when I'm pretty much off of the meds again, I can still feel that I simply can't enjoy the traditional way as much as I can with the scrolling pages. -I still can and do read traditional comics, as there is many I followed before all of this, and wouldn't miss. But I just don't really get in to many new ones that's traditionally made unless I like some part of it extra much.
This, ofc, is a bit of a special case, but this is why I prefer scrolling pages as the person I am today ^^