Anecdotally I find them helpful for design and I don't find them nearly as helpful for coding (strange, given others experiences reported online) I am working

Anecdotally I find them helpful for design and I don't find them nearly as helpful for coding (strange, given others experiences reported online) I am working on a compiler for an OCaml inspired language (I am on a sabbatical) and used them a lot in the early phases to check my ideas and search for prior work. I use them less now (mostly debugging at this point), but have made use of LLMs to write some pieces like source map generation, a couple of small and well known algorithms that were new to me, and an analyzer to dump a schema from a typescript module. Other times I've tried to use it for other things, I have ended up regretting it because of subtle bugs I don't think it made the design phase any shorter but it definitely helped save me energy in researching and made that period feel less like a fever dream. Design phases can be draining for me so that was welcome