It can be useful in some cases: to declare variables in the <template> directly.

An example of optimisation

If you have some notes, you can have a melody

La prouesse technique d'avoir du Wifi à bord des TGV, et pourquoi c'est si compliqué !

Des conseils sur l'usage d'une voiture électrique. Je poses cela ici pour partage ou utilisation ultérieure.

Summarized to:

Fight for Pareto's law, look for the 20% of effort that will give you the 80% of results.
Prioritize, minimalism isn't about not doing things but about focusing first in the important.
Perfect is enemy of good, first do it, then do it right, then do it better.
Kill the baby, don't be afraid of starting all over again. Fail soon, learn fast.
Add value. Think constantly how you can help your team and position yourself in that field/skill.
Basics, first. Follow always a top-down thinking starting by the best-practises of CSS.
Think different. Simple is harder than complex, which means you'll need to use your creativity.
Synthesis is the key of communication. We have to write code for humans not machines.
Keep it plain. Try to keep your designs with few layers of indirection.
Clean kipple and redundancy. Minimalism is all about removing distractions.

A great example!

Some dark/light mode toggles

How to handle spacing between css elements in one line of code?

.flow > * + * {
    margin-block-start: var(--flow-space, 1em);
}

Vérifier la validité des liens d'une page et y ajouter une classe .status comme .status404