As someone who bought the original dot at twice the price, I wondered the same thing.
They are cutting us a break, though:
"Something just for you
As a customer who purchased the previous–generation Echo Dot, you can get a $10 Alexa Shopping credit when you order the All-New Echo Dot using Alexa Shopping. Order today through October 20 and a $10 Alexa Shopping credit will be applied to your account within one week after your new Echo Dot has shipped."
They are cutting us a break, though:
"Something just for you As a customer who purchased the previous–generation Echo Dot, you can get a $10 Alexa Shopping credit when you order the All-New Echo Dot using Alexa Shopping. Order today through October 20 and a $10 Alexa Shopping credit will be applied to your account within one week after your new Echo Dot has shipped."