You said/implied 2 things:

- you've never written a custom Drop

- "Not really". Implying that your experience generalizes

I've written a bunch of rust programs without custom Drop. I believe your first statement. There are large classes of programs that don't need it. There are also many that do. I think your statement says a lot more about what kind of programs you work on than about custom Drop not being common. People are downvoting the implication that custom Drop is not a common pattern.