I have a very slow Internet connection (5 Mbps down, and even less for upload). Given that, I always download movies at 720p, since they have low file size, which means I can download them more quickly. Also, I don’t notice much of a difference between 1080p and 720p. As for 4K, because I don’t have a screen that can display 4K, I consider it to be one of the biggest disk space wasters.
Am I the only one who has this opinion?
Maybe you’re not noticing the difference between 720p to 1080p is due to the decoding used. The rips with a lower file size often get there by means of compression, and some uploaders (such as YIFY) heavily compress the videos to where I don’t even notice much of a difference, however I’m going to assume you’re not downloading the 3GB (average size for HQ) 1080p film.
Then again eyesight plays a role along with display.
I wouldn’t bother with 4K usually, however once I upgraded to a 1440 monitor downscaling from 4K actually provides a fair bump in overall sharpness and detail (some films more than others), however the file size is usually over 10GB per film.