Thinking about it, I find that I straddle the line on this. I'm up to date on the New Shiny and will happily run with whatever flavor of the month language, framework, and programming paradigm that a given gig wants. Yeah, sure, Node.js with tons of functional stuff mixed in pulling from a NoSQL store and React on the front end. I'm your guy. We're gonna change the world!

But for my own stuff, there's no way I'd use any of that crap. Good old C#, SQL Server and a proper boring stack and tool set that I know won't just up and fall over on a Saturday morning and leave me debugging NPM dependencies all weekend instead of bouldering in the forest with the kids. This stuff is my proper income stream, and the most important thing is that it works. If that means I have to write a "for" loop and declare variables and risk 19 year old kids snooting down at my code, so be it.

But yeah, the key is to never get so far down in to that comfy hole that you can't hop back into the present day when it's time to talk shop with the cool kids.