The inefficiency of the all call

Back when companies had offices, there was a button on the phone labeled "all call". It allowed you to page every speaker in the entire building at once.

"Tom P., you have a package at the front desk!"

It was a lot easier to hit all call than to just track down Tom. After a while, this group interruption gets tiresome because it's so wasteful. You interrupt 100 people to reach one, or you get ten offers of help (or someone to buy your hockey tickets) when one was all you needed.

Now, of...