I needed a bracket to hold a small USB hub flat against the underside of my desk, out of sight, with the ports facing forward. This is the sort of thing you assume exists. It does not. There are adhesive cradles for the wrong size of hub, and there are generic clips that hold it at exactly the angle that makes the cables fall out. Forty minutes of searching turned up nothing that fit, which is forty minutes I will not get back but at least felt productive.
So I drew it in FreeCAD. Two screw holes matched to the hub's existing case, a flat back, a lip on the front edge so the thing cannot slide out, and a pair of countersinks for the screws into the desk. Maybe twenty minutes of modelling, most of which was me remembering how the sketcher's constraints work after a month away from it.
Printed in PETG because it lives somewhere warm-ish and PLA goes soft if you so much as glare at it. One go, no supports, about an hour on the bed. It fits. The hub sits flush, the ports face me, the cables stay put. It cost a few pence of filament and an evening I would otherwise have spent scrolling.
The point is not the bracket. The point is that "design it" has quietly become faster than "find and order it" for this whole category of small, specific, exactly-shaped problem. That still feels slightly miraculous, and I do not want to stop noticing that it does.