As an added note: I've been using Yahoo since it started, and have stuck with them for thirty years despite other places (with arguably better security) having been made available. Largely because 'My Yahoo' allowed me a convenient and easy level of customization they did not possess, so I can quickly see and have links to that which I found pertinent within an attractive ui framework. Getting rid of that will remove any reason to continue using Yahoo.
As an added note: I've been using Yahoo since it started, and have stuck with them for thirty years despite other places (with arguably better security) having been made available. Largely because 'My Yahoo' allowed me a convenient and easy level of customization they did not possess, so I can quickly see and have links to that which I found pertinent within an attractive ui framework. Getting rid of that will remove any reason to continue using Yahoo.