Anthropic switched to HTML artifacts because they load 5x faster and handle 4.4...

https://technivorz.com/is-html-a-good-default-for-design-systems-compared-to-markdown-docs/

Anthropic switched to HTML artifacts because they load 5x faster and handle 4.4 million views smoothly every month. Using HTML lets their teams plan, review code, and design systems with rich, interactive content that Markdown can’t match