I'm really not understanding all the hate against HTML email. To me it seems like saying: "Ascii text is enough, who needs nicely designed word documents or web

I'm really not understanding all the hate against HTML email. To me it seems like saying: "Ascii text is enough, who needs nicely designed word documents or websites" Also, all our communications (website, snail-mail letters) use our corporate branding. So why not use it in our emails?