Exactly. I was advising a startup recently about what tech stack to use. Their default notion was PHP-centric. I pointed at the advantages of other languages/s

Exactly. I was advising a startup recently about what tech stack to use. Their default notion was PHP-centric. I pointed at the advantages of other languages/stacks. I said that while it's generally true you can get the job done in a variety of languages and tech mixes (anything that's Turing complete, eh?) it's still very important to pick the right mix, because it impacts other things. One of the things I mentioned was that it effects not just the quantity of folks you'll find on the market with that skill set, but also the quality and really the kind of person. For example, if I had to wade through 100 random resumes from strangers for a dev job I had to hire for, I'd get very different kinds of people if it were for say a PHP stack versus if it were a Java stack or a Lisp stack. Very different folks, on average. To be more explicit, I'm confident there would be way more applicants if it were PHP, but way better applicants, on average, if it were Lisp. (I did not literally recommend they go with Lisp (dev scarcity factor still a bit too strong for my tastes right now, though Clojure may change that), but I will say that it was not PHP.)