Why isn't there a setting on microwaves where you just press "on" and it counts up and you stop it when you're done?

I would use it. The bane of my existence is figuring out the quick timer for various microwaves so I don't have to push as many buttons.

ETA: It could beep once a minute so you don't forget about it and also know how long it's been on if you don't feel like staring at it! I got this. I need to kickstart this.