> I was really annoyed by editing big amount of hover:, focus: and other styles because of the duplication

I share that sentiment. I even "invented" something called "selectors" [1] which is a UI to handle all the Tailwind variants.

I popped this monstrosity of a Tailwind class in and your extension worked wonderfully in creating a tree of it: [2]

How ever when I collapsed it back to a single line something went wrong and it increased the length of the classes by ~15x creating this: [3]

[1] https://sinukoduleheabi.ee/docs/ska-blocks/selectors/

[2] https://pastebin.com/raw/Nk3xBHfw

[3] https://pastebin.com/raw/bKLdTYjD (Edit: pastebin removed it for some reason)