When you're told to restyle checkboxs to look like radio buttons.

When you're told to restyle ANY input fields. Rigid bastards...

Restyling can be OK, see the change from check buttons to toggle switches, which exist in the real world, I don't see check boxes except on paper forms.

But they fulfill the same conceptual purpose.

Restyling one element to look like another that does a different job (albeit similar) is just dumb. Especially considering the similarities...