FWIW, I, too have a paid Yahoo account. I’ve had it since 1999. I’m a digital pack rat and have every email ever sent to me*. I’m certainly not switching now.
The Wolf
* To clarify: If a person sent me an email that was not distributed to an entire list (i.e. my shul’s Z’manim list, for example) or spam or strictly commercial (like from stores whom I allow to send me email), then I keep it.