They never will though. Recently, they had “expert tasters” test how long their espresso shots tasted good, and their result was that “Starbucks espresso shots last up to 90 seconds.” This just so happened to take place right as they started introducing a new system on how to sequence drinks while on the espresso and cold beverage bars lol.
(Also, as a footnote, Espresso shots die after 5-10 seconds; the crema just dissipates after then, making the shot taste acidic)