Worth staying for by second five. Every seam has to deliver.

Give listeners something worth staying for within about five seconds, get to the hook early, make every section change deliver, and end clean. Streaming listeners decide fast and skip at transitions.
S Evidence: strong. Large trials or many studies, pointing the same way.
P Evidence: promising. Good studies, but small or few. Use it and keep checking.
Montecchio, Roy & Pachet 2020 (Spotify data, millions of listeners).
Not medical, legal or financial advice.
In The Ecosystem every framework comes with a daily action, a room that checks in, and the full library.