Privacy concerns led to browsers caching per-user and per-site, so there is even less advantage to "shared CDNs" in 2023's browsers. That said, tree-shaking ca

Privacy concerns led to browsers caching per-user and per-site, so there is even less advantage to "shared CDNs" in 2023's browsers. That said, tree-shaking can sometimes be a premature optimization if your site isn't a SPA with a comprehensive view of its tree to shake. Some MPA designs may still benefit from caching the whole ESM .min.js of a site-wide dependency and letting the browser tree-shake at runtime.