I have two libraries for movies because my home theater can let 4k + HDR shine while my Internet connection doesn’t have the upload to send that to family. They get stuck with 1080 and have never complained. My server has the power to transcode on the fly but for now I have the free space to keep both.
TV is almost entirely 1080 unless there is a super good reason to upgrade past that. I’m not actually sure if I’ve ever done that.