Submission statement: this is an old article about UIs that aren't organised in space like desktops are but in time.<p>With the advent of tools like git and nix, one wonders if the time is now ripe for chronology-centered interfaces. I frequently find myself wishing to have an integrated VCS in my filesystem (or at the very least, being able to treat my entire computer as if it were in a git repo so I can roll back changes) even if I'm on NixOS where you're basically on your own for files in your home directory.<p>It doesn't even have to be a complete replacement: you can imagine a tiny slider than can allow you to walk through the previous states of your desktop to see how your work evolves over time. But I guess (bi)temporality and immutability are still new ideas, and even in such a fast-moving field like ours it takes a while for certain things to trickle down from ivory towers.