There can be middle ground. I have a very similar situation to the OPs.
If I stopped working for over a year, eventually there would be complaints, competitors, etc
But within a one year timeframe, there's very little I have to do. And I could get away with working a couple months of the year only + maybe three hours a week maintenance, and the business would grow, slowly.
But, I work consistently, adding new things, because I want it to grow faster. I also know that the environment changes and eventually the current model may stop working or need adaptation.
What do you call that? It's not 100% passive. But, it's not particularly active either.
Actually, having written all this, I remembered someone did come up with a better term: residual revenue.
Meaning that I did a bunch of work in the past that continues to pay off. It will eventually decay, but not very fast. So I can devote most of my energy to new growth, or leisure, over the short to medium run anyway.
Do you think residual revenue (or income) is a better term for this case?