This was nearly a decade ago. I worked at a small app company (5-10 developers) for a bit that used Ruby on Rails for our product. The product was in active development, but was available to customers so it was “done”. We were hiring a senior level dev to oversee the team and we interviewed this guy (maybe in his 40s?, a but older than most people in tech) and he said his first order of business if hired would be to refactor the entire code base to php. I don’t think he was joking. I’m not sure why he interviewed.