This subject is more complex than you might think, and this article alone has attracted 326 comments before I had to close them. Many people dislike not having a hot valve on their washing machine. Most people probably don’t need one – yet others would be better off if washing machines still had them.
I’ve just spent a few hours updating my previously published thoughts on the subject (apologies for not being able to make it more concise). There’s also a lot of comments under this article, which anyone seriously interested in the subject may want to read before looking at my article – Should I buy a cold fill washing machine or hot and cold fill?