A non-destructive way of making hard surface creases in Blender 3.3 (or later).

This tool takes the edge crease data and converts it into physical creases in the geometry, which leads to procedural hard surface modeling effects.

(This is a geometrynodes modifier, not an addon.)

To activate the effect, set the 'edge crease' value to .1 or .9

The shortcut is Shift+E, or you can use the 'mean crease' value in the N-panel 'items' tab (when in edit mode.)

A subdivision modifier is recommended after the effect, but it isn't required.