The latter is the existing behavior, while the first one will let you truly remove something that was sent to another contact/everyone. That said, Google does note how “Messages may still be seen by ...

We may earn a commission when you click links to retailers and purchase goods. More info. Sending a message with an error to the wrong chat or with enough ...

Not that long ago, sending a message was final. It didn't matter if you had an embarrassing typo, or you sent a message to the wrong person: Once you tapped that "send" button, you were locked in, and ...