@evanw Awesome!

Is there any plan to ever add #systemJS module format support?

There's just this old and somewhat forgotten thread https://github.com/evanw/esbuild/issues/192

It is literally the only reason our company cannot move on to using @vite - because we use #singlespa we need systemJS to polyfill for old browsers that don't support ESM.
We *could* use vite for production builds since those are done using @rollupjs , but esbuild is used for dev/HMR mode and just unusable for us 😢