Dining at restaurant Shiny

A Shiny app is like a restaurant where:

• Server $\approx$ Kitchen
• User $\approx$ Customer
• Request $\approx$ Order
• R process $\approx$ Chef

But our chef can only start a new order after finishing the prior one (single-threaded), unless we make the event independent to the main program flow by using async programming techniques.

Source: https://www.appsilon.com/post/alternatives-to-scaling-shiny