Alpha has been called out by a viewer regarding why a wood suit hanger is far superior to its plastic counterpart. Aaron Marino of alpha m. stumbles with providing an answer why wood is better; thus, he doesn't provide a good, solid reason.
Ultimately, plastic hangers are essentially the same shape as wood hangers, which is the most important feature, but are a lot cheaper. Alpha discusses what article of clothing to hang on what shape of hanger as well as demonstrates how to hang a sweater properly. If you use wood or plastic, it's your own personal preference as well as you are using the proper hanger for the respective shape of clothing.
Modern Tailor Shirts and Suits Don't Need No Stinkin' Hanger! They Want to Be Worn!