Better late than never, I guess?
Take a look at the new Dell XPS 15” 2-in-1, with Intel Core i7-8705G (with AMD Radeon RX Vega M GH, 4GB of dedicated HMB2), e.g.
That thing ticks most checkboxes of a pro machine, except for the “is a Mac” and “runs Mac-only software” ones.
And I imagine that an upgraded version will come out in 2019. Honestly, I find both Windows 10 Pro and Ubuntu very usable nowadays. I don’t really find much reason to stick with a Mac anymore.
And I use BitTorrent and Usenet frequently.
Where/how are you getting all this malware?
Except for little things like (workstation) Xeon CPU and pro graphics (Quadro or whatever ATi is calling their FirePros these days).
If you want a actual pro system, check out Dells workstation line, e.g. Precision 7520. Sure, its not light and pretty like a XPS, but you can load it with fairly serious amount of stuff and as a cherry on top it comes with Linux support out of the box.
Workstations are just a different class of computers.
I'm worried that the XPS line is trying too hard to be a MacBook; what if they want to make next year's model even thinner?
Their "classic" XPS 15 looks fantastic, but I've read too many complaints about reliability and coil whine. I hope they keep iterating on it for a few more years.