I think it depends on your setup - if you’ve got a good 4k HDR TV then by all means you could just watch then delete and it would be worth it. But yeah good point, may as well do 1080 otherwise, if you want a collection. I’ve only got 90 movies at 1080p and struggle to justify keeping more than that.
Most people don’t even know what Linux is… and a huge amount don’t even know what version of windows they use