"Zero-configuration` bundler for tiny modules (/libraries)."

Microbunde is kinda made for libraries, not for bundling applications, what were you thinking of?

I am thinking about creating UI libraries (components) based on Svelte not applications.

For example grid component or calendar something like that :)

Then we could package the component into UMD build and provide to use as standalone and crossframework component. In fact you could replace svelte with any other framework with tiny output bundle (preact, hyperapp, etc). I am just interested in Svelte.