If I understand this correctly, it is similar to Parcel's bundler/minifier: https://css-tricks.com/parcel-css/
Except that Parcel is a parser, deduper, transformer [autoprefixer, future-CSS-to-current-convertor] and minifier.
And that, in turn, is based on CSSNano [although it is a complete rewrite in Rust], IIRC.
Can someone confirm that I understand correctly, and if so, how does this compare to Parcel? To CSSNano or PurgeCSS?