I agree with the premise of this article (if you wanna get paid, specialise) as it strongly echoes my own, perhaps limited, experience.

I am a generalist. I like being able to solve problems across a wide spectrum of fields. Working at a startup for the last three years has given me plenty of time for that. The flipside is that I have not had much opportunity to specialise. I take pride in being comfortable diving into anything. However this has meant I don't have DEEP knowledge of a specialist.

At a previous job, I was able to dig really deep on Solr and build some expertise. In the intervening years however most of that has become way outdated.

Also I've found (in an admittedly limited sample size of interviews) that jobs seeking "full stack" developers tend to really be seeking someone to fulfill a specialised role but ALSO be comfortable moving up and down the stack as the need arises.

So obviously in my next job I've been looking for more established organizations where my opportunity to specialise in something I enjoy is greater. I think I've found one and am quite excited about it.