All of my computers are Slackware Linux boxen running (if they have a display at all) a heavily customized fvwm2 config that's been in a coevolutionary symbiosis with my usage patterns for about twenty years.

I've found that, in the simple case where I've handed someone a laptop with a web browser in focus on-screen already open to the page that they want to look at, it typically takes less than five seconds before they go, "Ah! I lost it! Where did it go?! What is this stuff? How do I get back to the browser?"