Your audience is dying.
Like cigarette smokers, the people who listen to podcasts are constantly changing.
Just as smokers may quit or face health issues that keep them from consuming cigarettes, podcast listeners can similarly fall away from even their most dedicated listening habits. Life changes, such as a job change, shift in personal interests, or loss of free time, can all work against your keeping listeners engaged with your podcast.
Even if you treat existing listeners well, you’re going to lose some of them to things beyond your control.
Then what?
Without fresh ears, your reach and influence will decrease.
Be grateful for the people who listen to you now, but never stop promoting yourself and exposing new people to your podcast.