Utility classes: which classes should have an !important annotation on their declaration?

[PolariTOON]

We sometimes use !important to increase the specificity of some declarations made by utility classes. This has the advantage to help us override some styles set by MUI.
Not every utility class annotates its declarations with !important though. We currently have it for dimensions (u-w*, u-h*) but not for some display utility classes for example.
What is the rationale behind putting it on some declarations but not on others? Should we put !important everywhere? Or investigate other ways to increase specificity such as inline styles or @layer rules?

[Crash--]

Should we put !important everywhere?

Yes. We "cloned" what we have seen in bootstrap. And in bootstrap all utilities are !important. I think that tailwind was also in that case previously but seems to not use important anymore.

If you check the git history, you'll see that we had !important for all our utilities class, it was the main goal : being able to override any style :)