Hello! I ask this question half in jest and half serioiusly. I've been using a Tachihara 4x5 and enjoy it qute a bit. I get out on the weekend and over two to three hours I expose and develop 4to 6 4x5s TMax400. I've played around with an 8x10 pinhole as well.
I've been curious to try my hand at some contact printing with silver, cyanotype, and/or POP and I recently purchased a Kodak #2 to give it a try. Weight and expense seem to go up exponentially with increase in size and longer lenses become more difficult to use.
As I try out the 8x10, I'll answer the question for myself, but I'm curious about those who decided to switch from 4x5 to 8x10 - why did you make the jump? What was there about 8x10 that attracted you? Did you ever regret switching to 8x10 or even decide that 8x10 wasn't for you and went back to 4x5?
Thnak you and best regards.

Mike