Why no undo button for email?

During the last decade 14 years or so i have had countless times where i send an email and then either regret it miserably “when sober the next day” or “none of that made sense i was tired”.

Wheres my undo/cancel/unsend button???

Its 2010!

I sent a picture of a surprise present to the person everyone is trying to surprise…whats your thoughts on that?