I'd agree with the first part, that smaller (earlier) startups may be better for learning more breadth, but there's still a pretty substantial range of sizes be

I'd agree with the first part, that smaller (earlier) startups may be better for learning more breadth, but there's still a pretty substantial range of sizes before reaching "large". Startups, VC-funded in particular, tend to have the characteristic of very rapid growth, which can provide even specific/niche opportunities otherwise unavailable (on anywhere near the same time scale) at a large company.