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Re:Investigating why McDonald's ice cream machines are often... by slantyyz on Monday April 26, 2021 @10:18AM (#26942746)
The Wired article explains this more clearly than the video. These machines do more than the ones at the other places.

"But what makes the machine special is that it has two hoppers and two barrels, each working independently with precise settings, to produce both milkshakes and soft serve simultaneously."[1]

1: https://www.wired.com/story/they-hacked-mcdonalds-ice-cream-...

Re:Investigating why McDonald's ice cream machines are often... by dsr_ on Monday April 26, 2021 @12:27PM (#26944437)
Sounds like having two machines would cost them some space and increase the reliability.

Do the franchise owners want that increased cost and reliability?