Simple really. I've got 7, 6, 5 1/2, 5, 4 1/2, and various others (non of which I have to carry). If I'm doing a lot of planing I might just work my way through the the top 5 or so instead of stopping to sharpen.
Not inefficient at all. Come to think that's when I'm most likely to use the 6 which otherwise I tend not to pick up. If there's a sharp plane lying there why not just go for it!
A bit of overthinking going on here?
Basically you can do all basic stuff with just a 5 1/2.
I'm not sure how many people believe you've done much dimensioning work by hand, especially as a volume vs. much of anything else.
I don't get the sense that anyone here does much of it, aside perhaps from adam working from riven. And I'm just guessing he does that.
I can tell by the way that Warren Mickley talks that he does it, the talk about sharpening, economy of effort with various things and his comments about doubting that rip sawing was left to the least skilled in the shop, or anything of the like.
I landed just by continuing to do work instead of pushing wood through machines and then talking about using planes a lot or for crude work....exactly at what Nicholson describes. I think almost everyone would - it's just a natural landing point, and I've seen the only two people I know who actually did much work by hand end up at the same place. Brian Holcombe and Warren. I don't round over cap irons corners, and I walked the boards a little more than i needed to early on with the jack plane. Warren pointed out that Nicholson said to match the cap to the iron (I still don't think that serves a point, and I don't think Nicholson had a better grasp on planes than I do, because my planes don't have any of the shortcomings that he asserts are there - like leaving the cut shy of the corners. I solved that by my second double iron plane and I think all of the English planemakers did later).
The comment about working at arms length down a longer board and then moving periodically and not being to quick to want to work the full length of the board until the end turns out to be more productive.
If you were working by hand, you would be talking about stuff like this. Nobody or near nobody is doing it, but everyone seems to want to assert what can or can't be done. Even DC tried to stick me with a couple of things that couldn't be done while he was still around (not being able to plane a length straight or hollow without stop shavings, etc) and I know he had no ill intentions - he was as honest as anyone I've met.
Most people aren't doing it because they wouldn't like it. Some aren't doing it because they think they're above it (few are), and I think there is a small share of people who would like to do it if they could get decent advice. Maybe I'm wrong.
Calling things like plane setup and cap iron discussions overthinking gives me plenty of information to know what I need to know.