Why can't older people be given the option of changing back to Classic mail.?

Many of my friends in their 70's find the new version of Yahoo Mail impossible to use. The layout is just far too confusing and difficult for the older mind to process. Fortunately, I clicked on the option to keep Classic, but a lot of my friends missed this , and are now stuck with New Yahoo, and there is no longer an option to change back to Classic. I have been appointed (as I am the only one still on Classic) to try to 'get them back onto the old mail' , they find the whole thing too cluttered, too much information, and even finding/using help option too difficult. Surely the option of changing back to Classic should be restored, especially for older people who are finding New Yahoo Mail too difficult.