The podcast ("playlist") player is limited to 100 episodes for the Starter plan. However, the Growth add-on has historically allowed unlimited episodes to be shown in the player.
As of today, the Hi-Fi add-on will also remove this limit. Growth add-on customers' subscriptions are unaffected by this change.
If you are a customer with both Growth and Hi-Fi add-ons enabled, and you only choose to subscribe to the Growth add-on for the unlimited episodes in the podcast player, you can now discontinue your Growth add-on to save $10/mo.