I'll add: the React site uses the (larger and slower) development build of React because it can be useful to people visiting the site. Ordinarily you would use

I'll add: the React site uses the (larger and slower) development build of React because it can be useful to people visiting the site. Ordinarily you would use the prod build. Not to mention the lack of script bundling and inefficient (blocking) loading. Just hasn't been a priority for us.