No doubt code quality increased substantially, but I've been wrestling overengineering for a long time, with both GPT/Claude - they will take any small chance to write excess code/documentation/specifications, anything - they seem to love reinventing the wheel. Heck, even prompts sent to subagents are walls of text.

Explicitly requiring simple solutions works for simple problems, but for more complex ones, complexity quickly creeps in. I even ask the alternative model to challenge the complexity of solution, but doesn't work really well.

There is a perverse incentive for AI companies to train models to be verbose, as it increases the tokens consumption.