A majority of the media in my feed are primal urls with spinners (for stills), and black rectangles, or small video files that pause for half a minute every half a second, for video files. I'm willing to bet that Primal users don't experience this, but it makes Nostr pretty lame. I often scroll past, otherwise I'd be waiting minutes for each Primal-media-related post. The web of the 90's was faster.