For noobs: web devs store data from their server in your browser so that if you look at that data again, it's really fast to retrieve it. This is called caching the data.
Before this update, when a user would view something, I would use the cache but not check the servers to see if the data had been updated. Now we check to see if the data has been updated.
tldr; The UX is roughly the same but the data you view on SN is now more likely to be up to date with the server - so less need to refresh.
Going to actually begin working on tipping now - while resisting the urge to pay off some other technical debt.