Coding as the fun stuff need you to be able to focus and due to responsibilities (which include a whole lot of system architecture, people management I do enjoy and can do well).

Basically you get to a point in your life and career where you have to decide whether you want to be the absolute best engineer, or whether you want to be building the best environment for building and retaining the best engineers. I kicked the can down the line but it was eventually having three kids which made me realise that the latter was my path. That and it was becoming increasingly harder to actually do #1 when you seem to be surrounded by incompetents taking the second path who, as they often never became competent engineers but seem to have a large influence on decisions as a group.

It's not that I like writing code exactly it's that the domain of the code I can write to a professional level doesn't overlap with the code I find interesting to write. Or in the case of web frameworks, worth spending two days understanding the new dialect of whatever the latest fad framework is so that I know what I'm doing and not copy/pasting or otherwise working from example.

What might make it hard to understand is that the vast majority of people who call themselves engineers don't do so to the level I consider professional; especially in the app / web development / start-up world.