I cut the cord back in 2016.
I've been using Roku since 2012. I like the Roku interface, and the Roku remote. It's little things like that, that separate Roku from Firestick and the Apple box.
In 2018, I upgraded to an LG 4K Smart TV. There is some overlap, with Roku, in that the Smart TV allows you to download apps, for things like YouTube, Pluto TV, and other streaming platforms, that are also available through Roku.
But as I stated before, I really like the Roku remote design and functionality for navigation. So, I use my Roku mainly for YouTube (the Free YouTube -- I do not subscribe to YouTube TV service...)
I watch a LOT on YouTube. Music, Documentaries, Current News and Live Breaking News, etc. And YouTube streams in 4K as well.
I have a Roku TV in my office. It integrates the OTA (Over-the Air) channels with the streaming channels I have selected from Pluto TV and other portals.
By integration, I mean that when I go to the Channel Guide, I see what's playing now, for all of those channels, OTA AND streaming channels, in one place.
An important link in all of this is a wi-fi router that can deliver high speeds. I upgraded to a 5G router last year. It has made a real difference when I'm streaming 4K HDR movies from VUDU or Movies Anywhere. My current $K Roku works with 5G (NOT to be confused with 5G cell phones---that's a different thing...).