[jongjong]

It can be meaningful but it depends on how they've been using that time. If they stayed at one company working on one project on a specific feature for 40 years straight, they may be a world class grandmaster in a very specific area which is only relevant for like 5% of all projects but have narrow experience and be incapable of providing advice on most coding topics that affect 95% of projects.

[a96]

There's also a critical difference in the causality flow. Time alone will teach nothing but cynicism. But a lot of things take a long time to learn. Age and time is not a useful predictor by itself, but it's often correlative.