You are technically correct. Even though that's the best kind of correct, I'd see these later developments as mostly natural refinements of the medium, that did

You are technically correct. Even though that's the best kind of correct, I'd see these later developments as mostly natural refinements of the medium, that didn't really alter the fundamentals. From Jenson until the first Grotesk fonts I don't think there was anything large one-time leap, but rather a sequence of gradual evolutions.