It's worse from a work perspective. Designers end up with multi-hundred MB PSD files where multiple people cannot work with the same document concurrently. It

It's worse from a work perspective. Designers end up with multi-hundred MB PSD files where multiple people cannot work with the same document concurrently. It does nothing to help their consistency, since you cannot define common styles to be reused. And it has a trickle-down effect, where any developer working with the files now needs a license to open the document.