You really do open up new topics as we go along here. Migrating company desktops to linux is indeed challenging. Mostly because of lock-in. Sure, there are applications, some places more than other places. In HPC related industry you frequently have the opposite, applications, yes even proprietary ones, are often only available on linux. Guess what, proprietary 3D viewers are abundant on linux.
Start a new thread and I can join you in this discussion. For this thread we have already expanded the capabilities of LWN.