This is happening to other forms of competitive programming too. The most recent AIs have problem solving skills rivaling top humans, and so if AI can't be easily banned, the competition is dominated by AI agents.
I thought code golf would take longer for AIs because there's so little training data (it's more niche), but we're seeing AIs starting to match expert humans there too. Sucks because golf has been my favorite type of programming puzzle.
It's crazy how far AIs have come in problem solving ability.
Code golf is well-suited for AI because you have a easily verified objective (minimize code size while passing tests) and can run an LLM in a loop to churn away at it.