[HenryBemis]

I have a similar blessing/problem. I've filled forms that do the additions and keep you in check that you don't end up with 104 years. On the other hand, if you are anything like me you spend a good amount of these 40 years working 10-12 hours per day (and some times the weekend)(I remember in 2001-2003 I was working in a food company and during some weekends we would be doing the hardware work, so removing servers, installing new ones, setting up new racks etc. So those 3 years were in reality 4 or 4.5 (and I got the paid overtime to prove it).

The "system" still serves the ones who grow vertically Junior X, X, Senior X, Junior X Manager, X Manager, Senior X Manager, and so on. I remember listening to DOAC chatting with Harley Finkelstein of Shopify that was describing how he appreciates T-shaped skill-set. So you master skill X (as you 'grew up with it') but as time was going by you also developed other skills in parallel.

Modern companies & minds get it and celebrate it. Old-school-ers don't (and probably never will). There is also the thing "I want him/her to do X, so (e.g.) project management skills are not useful". And then I am happy when I hear this on an interview because I most definitely do NOT want to work with that person! :)