CSS, JavaScript, and static assets like theme images and fonts are now served directly from Vercel or Netlify’s CDN rather than through the ServerlessWP handler.
First load times should be approximately 200ms faster and compute time is no longer wasted serving these static resources.
Previously, files had to be served through the handler at least once before CDN caching kicked in through the use of default cache-control headers.
Checkout the code changes for this improvement at GitHub: Vercel support & Netlify support.