In-place Revit families are powerful elements that can be created in the context of the Revit model, but they come with performance tradeoffs.

The following quote is straight from the Revit Help topic:

“You can create multiple in-place elements in your projects, and you can place copies of the same in-place element in your projects. Unlike system families and loadable families, however, you cannot duplicate in-place family types to create multiple types. Although you can transfer or copy in-place elements between projects, you should do so only when necessary, because in-place elements can increase file size and degrade software performance.”

Instead, you can use Ideate Explorer to find and audit in-place elements to make sure they are being used properly in our project.  Learn how: General Purpose Example of Using Ideate Query in Ideate Explorer for Revit.