Modern piracy (the so called *ARR stack) provide UX that is pretty close to what you get from streaming services. In some cases even better - now I will use just one app on my TV to watch everything, will not be affected by Netflix/Prime/Apple/Hulu or internet provider outages when I am watching a movie or TV show, and will not have to go through 4 or 5 apps when I am searching for something specific to watch.
The UX is slightly worse when I find a movie or TV show via Plex Discovery and want to watch it immediately, since I will have to wait for *ARR to pick it up and download it, but for now I have quite a few TV shows to finish watching before it will become an inconvenience for me, especially given the fact that this stack can subscribe to upcoming shows - I can tell it that I am interested in Fallout for example, and it will monitor releases and download the show once it will become available.
Regarding the pirated content - I just started, so my experience have pretty low sample size. Still, majority of shows I downloaded so far are in 4K. The only one in 1080p is older show, for which I think there's no 4K source material.