WTH can't we schedule one-time service calls?

[clintm (Clint)]

Very similar to my WTH

WTH why can't I make one off async scripts/automations

Often we have wait for condition or wait for times written in automations. However, they don’t persist on HA restarts. Often the solution blueprints and automations have is to create a state machine and a timer. This can be rather complex. A simpler idiom might be to take inspiration from promises and async programming by making the ability to do async scripts/automations. Essentially there should be a service call to make delayed action temporary automation for one off timed events or as part …