It depends. I work in an industry (automotive infotainment) that makes very complex products where entire product cycles take 2-4 years and projects run for 6+

It depends. I work in an industry (automotive infotainment) that makes very complex products where entire product cycles take 2-4 years and projects run for 6+ years. There's valuable stuff to learn from experience in every phase of a cycle. Having seen at least a full cycle can be a very useful flag for seniority. It's not a requirement per se, however. Fresh/outside thinking can also contribute much.