@aleksei_ovsienko wrote:
The problem with it is it often just fails to perform boolean operation. And also it often doesn't select all bodies with a window selection and you have to go body by body and manually select. I most often use this for imported CAD, like PCBs. They have hundreds of bodies often and I really think Fusion could benefit from a simple Save As Solid feature. All the other CAD systems have it. It's really annoying, upsets me in a big way.
Saving instanced components into a single solid can substantially increase file size and memory consumption and hinder performance.
Particularly for PCBs it is a better option to just delete all the small passives.
Fusion's select by size function can be of great help here:

@TrippyLighting - moderation team has edited the quoted material to remove a ground rule violation which was removed in the quote´s original post.