Try doing this with 3rd party sound libraries (e.g. East|West) and you can quickly get into loading times that are hugely longer. I love opening my projects that only use Logic's built in synths, because they load quickly compared the marathons that can ensue when I am working on a large, fully-orchestral, 70/80-track piece.

And that's before I've added other media, such as video, to the project.