To clarify, I didn't mean we should be using ancient models in production, I meant in R&D.

Anthropic says "do the simplest thing that works." If it works with the LLMs we had 3 years ago, doesn't that make it simpler?

The newer LLMs mostly seem to work around the poor system design. (Like spawning 50 subagents on a grep-spree because you forgot to tell it where anything is...) But then you get poor design in prod!