I like the old school single page format, personally.
Vertical is good and I enjoy plenty of vertical comics, but I grew up on old school comics that me and my dad read together, plus manga. I always loved interesting paneling so naturally by the time I get pretty decent at it, vertical formats become more of the standard for mobile reasons.
I personally prefer reading pages but like having the ability to scroll down to the next page as opposed to clicking over to the next page.
Maybe I’ll occasionally do vertical pages, if it suits the scene I’m trying to do, but I just like pages instead. Also it’s easiet for me because I can’t produce enough content quickly enough to justify vertical pages, IMO.