I find the LLMs boost my productivity because I've always had a sort of architectural mindset, I love looking up projects that solve specific problems and keeping them on the back of my mind, turns out I was building myself up for instructing LLMs on how to build me software, and it takes several months worth of effort and spits it out in a few hours.
Speaking of vibe coding in archaic languages, I'm using LLMs to understand old Shockwave Lingo to translate it to a more modern language, so I can rebuild a legacy game in a modern language. Maybe once I spin up my blog again I'll start documenting that fun journey.