I'm not assuming, I'm just saying a vast majority of 40+ devs in my area fall into those groups. It's a different story at tech hubs where there's actual career growth.

I see. This conversation tends to be focused around tech hubs, so I figured you were talking about tech hubs by default. Which goes starkly in contrast to my exprience with senior developers.

At least in tech hubs, it seems like by the 30's they'd burn out. Those still kicking in their 40's seem to still enjoy their work, IC and mangement alike.