To understand why this version commands respect, we have to look at the specific tools introduced and perfected in the 2018 build.
The "Top" edition came with a robust link to Bimplus—Nemetschek’s cloud collaboration platform. This allowed distributed teams to view the federated model on iPads in the field, mark up PDFs, and sync comments back to the 2018 desktop client. allplan+2018+top
If you have access to this software, these five workflows are why the "Top" tier costs a premium. To understand why this version commands respect, we