I was already 40 years old when I first registered here in 1999.
My "midlife crises" started long before that - not by choice - with a succession of "being made redundant from promising careers by advances in computing technology" as the shit I really_wanted_to_do with my hands and my mind were progressively taken over by iterative improvements in computing which were "good enough" even if not, ever, duplicates of the quality of a craftsman's hand. I turned 90 degrees left; so did computing. A few times. Once or twice during my career as an Arsian.
So for some definitions of "midlife crisis," on the one hand my working career has been defined by it. By other definitions - those involving the concept of "voluntary" - well, I've been a passenger and not the driver. I've built myself up from Ground Zero to positions of power in completely differing niches (usually soft power 'cause that's how I roll) so many times that the idea of a true "midlife crisis" was never applicable in my life. It's all been like this.
I'd write a book but nobody would believe it as fiction much less autobiography.
SuperDave, I remember you going through some hard times a while back, so I'm assuming that things are better now? What are you up to these days?
I would definitely read the book of your life story.