Viewport-relative widths are a poor practice for accessibility, in general (maybe you don't care for your small personal website). The user can't set their own preferred size, font-size becomes illegible at small sizes, and way too large on large viewports (2160px is becoming more common). It breaks zoom on some browsers as well.

The clamp() examples here mitigate that somewhat, but why do we need fluid shifts in text size? Just use media queries.