In practice, there's rarely "afterwards". You visit some website once because someone sent you a link. You load that one page and that's it. You read the articl

In practice, there's rarely "afterwards". You visit some website once because someone sent you a link. You load that one page and that's it. You read the article and close it. By the time you visit that website again, if you ever do, your cache will be long gone, so you're downloading the 2-megabyte JS bundle again. In other words, pretty often the initial load is the only one.