Actually, half said they'd pay full price. I already have paid for the Pro version and I can run the 2016 version inside Virtualbox.
Unfortunately, I can't upgrade to the 2017 SketchUp because Trimble insists on better access to the graphics card.
(Which I am willing to live without, so I'm "stuck" with the 2016 Pro version.)
Trimble's solution to Linux is announcing: "run it under Wine." Wine's summary for SketchUp 2017 is "garbage" because SketchUp won't run at all under Wine, as of January 2017:
Manually installed .NET 4.5.2 in a 64bit wineprefix, then SketchUp installs flawlessly. Does not show up in application menus, and when program executable is run, it spits out errors and crashes before starting any interface.