See the ShinyReactLogs.key
Keynote file for Shiny execution scheduling templates. You too can build reactive graphs that look like the "real thing"!
This reprex illustrates that when the UI for a Shiny input is removed, the reactive input for the UI remains in the reactive object and is still reactive.
This example is modified from the reactive-dedupe
example from daattali/advanced-shiny. I have added a shiny script to help my brain.