I am finding lately that almost any blade will work for any task. It really comes down to efficiency for blade selection. When I was working for a fast paced remodel company, this was very important. I carried a stockman and found I really only used the coping and spey blades for work. The nice long clip was kept clean and razor sharp which was great for food or the off chance my other two blades where not up to a task. I kept a fine sharp edge on the spey and the belly worked great at cutting sheetrock and foam for templates. The coping blade was kept a little toothy and would rip through cardboard. Used it the most cutting open caulk tubes, scoring plastic panels, shims, rags. If either blade got too dull, the other picked up the slack. I started the job carrying a 3.5" jack knife with clip main and pen secondary.I used a utility knife a lot then and thats when I purchased the stockman. It was an experiment to see what blade I used most and like others have stated, the coping blade was the winner. I rarely cut food with my pocket knife and if I do its usually a piece of fruit. I can easily peel an apple with a small coping blade.
Being back in my trade as a stone fabricator my cutting tasks are far less in a day and usually not time sensitive. I took my experiment with the stockman a step further and purchased a single wharncliffe blade to try out. I wanted to see if I could A. Stand to carry a single straight blade and B. Find out what that fine tip of the wharnie could stand up to. I have enjoyed the single blade and how I can not tell its in my pocket. While I have broken the very tip off, it was less than 1/32 loss and still much more pointy then a sheepsfoot or coping.
I have found what I prefer for sure. Could I carry a Charlow and make do at either job, absolutly (and I did

). It really just comes down to what you like and what your daily tasks are. If I am in the shop my 55 houndstooth is more then enough. If I know im going out to install I will try to carry a little bigger knife as I like more handle when I need to score sheetrock or notch wood trim. I get caught all the time going out in the field with only my 55, it handles those tasks just fine