Many of us signed up for Yahoo Mail since the dialup days
Same as Hotmail (which became a turd after countless 'innovations' by Microsoft).
One of my friends has a Rocketmail account... before it was acquired by Yahoo in 1997.
Yahoo Japan is quite autonomous, and its webmail service is more similar to the 'classic' Yahoo mail. If you know Japanese, you can sign up for an account and see for yourself. Even the Yahoo Japan home page portal resembles classic Yahoo.
Good things happen when you're insulated from the madness afflicting the corporate headquarters.