Yeah, I gotta say, I'm finding
@Lanefan's experience a bit strange. But, then, you have to remember, he's only run 2 campaigns in the last twenty years or so. So, it's a bit of a different table. I imagine you're a lot like me and run new campaigns pretty routinely. I've played/run over a dozen campaigns in 5e alone.
I mean, I had players asking me to run the Shattered Obelisk campaign last week. Which means when my current Spelljammer homebrew wraps up, I pretty much know what I'm going to be running.