TJaniF opened a new pull request, #47354:
URL: https://github.com/apache/airflow/pull/47354

   "Oh I need to unpause the DAG to run it, gotcha"
   *click*
   Many DAG runs spawn and start running
   "Nonono I only wanted one, stop stop"
   
   ⬆️ This was me almost 3 years ago, using Airflow for the first time, 
obviously not understanding scheduling yet, and thinking of catchup mainly as a 
condiment. 
   
   Now I know how start_date works, but I still often set it just a while in 
the past because time math can be hard. Setting catchup=False has become a 
default and I don't think I've written more than one or two DAGs without it, 
ever. 
   
   Talking to other Airflow users, my experience seems to be the common one, 
especially when first starting with Airflow, accidental catchup as a rite of 
passage. 
   
   Preparing this PR I also think the vast majority of example DAGs have 
catchup=False, it's the de-facto default, so lets make it the default? :)
   
   Side note: The tests appear to use explicit setting of catchup when testing 
it, so no adjustment needed there as far as I can tell.
   
   ---
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