Rock climbing. To start out you basically just need $150 worth of shoes and some $5 chalk. Trad climbing or big wall climbing can be 5 figures and a dozen years worth of experience. And the skill ceiling is probably obvious, but it’s become an Olympic sport for a reason.

Here’s the source of that term. https://pluralistic.net/2023/01/21/potemkin-ai/#hey-guys

Excellent article.