I view writing a language as either a creative epiphany or evidence of psychosis, so when I see someone with a language on their CV I'm always careful to explor

I view writing a language as either a creative epiphany or evidence of psychosis, so when I see someone with a language on their CV I'm always careful to explore why they wrote it. Surprisingly often they think it's going to Solve All The Problems rather than allowing them to explore one of the deepest and most important parts of the programming art. I've written little languages (mostly for generating code in other languages, which proved to be an interesting way to explore certain design patterns) but always shied away from going all in on a bigger language. Maybe when I retire...