most tiling WMs have this behavior and it makes more sense than clicking to gain focus, but it have to be battle tested
focused tab has red line, need something more prominent and nicer
hovering unfocused inactive tab focuses it in background – could be feature, could be bug
point to inactive tab and press ⌘W to close it..?
sometimes splitter eats mousemove event and tab won't get focused
repro: moving cursor really slowly across splitter
recoil.js is dumb for not having shared state across multiple React roots (there is a issue filed: https://github.com/facebookexperimental/Recoil/issues/140) – faking reactive state for focused tab is really ugly and really-really bad
mousemoveevent and tab won't get focusedShowcase: