Same here 10+ years on Jekyll, old Ruby version, zero interest in changing it. I run it in a container too. It just works. It generates HTML and HTML still works. I'll be on this setup for another 10 years.
The tell isn't any single word, it's that everyone converges on the same mildly enthusiastic middle manager voice with the same sentence length distribution.
We run into this daily building Metric37.com in the same space, and the hard part isn't swapping vocabulary, it's breaking the rhythm so outputs stop looking like a normal curve.
Good luck with the job hunt, the infographics will survive us all.