Here's a similar story. Amazon Prime sent out a list of Rokus it will stop supporting (upgrading):
Dear Customer,
Amazon will no longer be supporting the Prime Video app on your Roku device (The specific models no longer supported are: 3500X, 2710X, 2720X, 2700X, 3050X, 3100X, 2400X, 3000X, 2500X, 2450X, 3400X, and 3420X) as of 1st November, 2021. We are continually upgrading our service and this occasionally means we can no longer support certain device models.
To help you to continue streaming your favorite content, customers may purchase a new Roku device at a discount. Log in with your Roku account to see the offer:
Roku.
A complete list of compatible devices where you can continue to watch Prime Video can be found here:
Prime Video: Help.
Thanks for watching with us.
Sincerely,
Prime Video
www.amazon.com
I have a couple of older (5-6 yrs.) sticks I no longer use that are on that list.