Open a work to-do list on a bad day and you'll usually find the same thing: forty-something items, half of them stale, and no real signal about which two or three would actually make the day a win. More space for tasks doesn't fix a busy day — it just gives the busyness somewhere to hide.
The brain dump button is built for the mornings your head is already full before you've opened your laptop (the client email, the deck that's not done, the thing your manager mentioned in passing) — dump it all into Someday in one go, so it's captured but not staring at you. Today then holds only five tasks, deliberately, which forces the honest question a long list lets you avoid: what actually has to happen before you log off? Everything else waits in Someday until it earns a slot. Just try it on your next chaotic morning — empty your head first, then pick five.