I made my logo as a vector so I could easily scale it for merch and things... but I can't imagine the faff of making all my pages as vectors.
I've done work as vectors before, like the Serverless Days mascots...
Where the new ones had to fit in with the existing one eyed cat, and also be made into pin badges and stuff. It took me weeks to make all these, painstakingly putting down each line and area of shadow... I love them, but... AGGHH.
The other way is to auto trace, which I tried on the shiny gold design for covers of these Adventuring journals I sell with my partner:
It mostly traced it okay, but I had to go in and painstakingly fix a lot of small details, even having drawn it quite large.
Basically, I can't imagine making a vector comic using either technique and keeping to a decent schedule. It'd be very annoying, and I think my raster work looked pretty good in print, and it definitely looks fine scaled down to 940px, at which point it's probably impossible to tell the difference.