Anthropic switched to HTML artifacts because they load 5 times faster than...

https://oscar-wiki.win/index.php/How_do_I_package_an_HTML_artifact_approach_into_a_reusable_Claude_skill%3F

Anthropic switched to HTML artifacts because they load 5 times faster than Markdown, making code reviews and reports feel seamless. With over 4.4 million views internally, HTML’s rich formatting keeps designs clear and planning smooth