It wasn’t that prescient. GroupWise allowed that in the 90s. I knew a few psycho manager types who were angry when I moved them to Exchange because they would track who opened their messages and yell at them if it wasn’t fast enough. :)
Snow Crash was satire of a genre of sci-fi story, so while it may have popularized some ideas I don't think it was trying to be prescient. Entertaining though :)