All of the extra building and testing can be automated, so the extra work just becomes a matter of reorganizing the work to make logically cohesive commits and it's more work in the same sense that writing good comments is more work. Whether building and testing each commit is done as often as it should be....
I would bet that many people eyeball it, build and test the end result, and claim that that's good enough. Since many of these people probably edited out a commit with a message like "lol typo broke the build" that might be an overly optimistic attitude ;)
In any case, I don't see how it decreases the chances of good results. You already dismissed my suggestion that it's nice to have each commit build and pass tests, so it's a bit strange to start worrying about it now.
I would bet that many people eyeball it, build and test the end result, and claim that that's good enough. Since many of these people probably edited out a commit with a message like "lol typo broke the build" that might be an overly optimistic attitude ;)
In any case, I don't see how it decreases the chances of good results. You already dismissed my suggestion that it's nice to have each commit build and pass tests, so it's a bit strange to start worrying about it now.