Be aware if you drop cable a lot of the channels will not be accessible with your Roku
They’re all online. You just have to be persistent to hunt them down. They’re also free of course.
What is an example of a channel you cannot get over Roku? With Hulu, YouTube TV, HBO Max, and nearly every other cable network provided within a Roku app (of course, there may be charges), you might only need an antenna for getting local station content.
Heck, there’s multiple ways to get live CNN on Roku:
https://cordcuttingreport.com/2021/01/19/stream-cnn-live/