Espresso "Passes Away" Within 15 Seconds?

https://arvicaf8aa.doodlekit.com/blog/entry/13934433/how-long-will-an-espresso-shot-last

Crema is the layer of foam that generally sits on top of an espresso that has actually simply been pulled. The common standard in coffee making is that as soon as the crema disappears from an espresso, the shot