I love scroll lock still existing on keyboards. Some operating systems still use it to control text scroll for some reason (useful when you don't have `screen`

I love scroll lock still existing on keyboards. Some operating systems still use it to control text scroll for some reason (useful when you don't have `screen` installed maybe?), but I mostly use it for toggles in video games. It shows the toggle state on a physical interface, like one of those fancy programmable macro keyboards, but on commodity hardware!