But realistically not all projects will hoard all their ideas. Suppose instead that for the leading project, 10% of their new ideas are discovered in-house, and 90% come from publicly available discoveries accessible to all. Then, to continue the car analogy, it’s as if 90% of the lead car’s acceleration comes from a strong wind that blows on both cars equally. The lead of the first car/project will lengthen slightly when measured by distance/ideas, but shrink dramatically when measured by clock time.

The upshot is that we should return to that table of factors and add a big one to the left-hand column: Leads shorten automatically as general progress speeds up, so if the lead project produces only a small fraction of the general progress, maintaining a 3-year lead throughout a soft takeoff is (all else equal) almost as hard as growing a 3-year lead into a 30-year lead during the 20th century. In order to overcome this, the factors on the right would need to be very strong indeed.

But won't "ability to get a DSA" be linked to the lead as measured in ideas rather than clock time?