AppleInsider has a great article on managing expectations for the new MacPro. It is basically saying what I have been thinking that the Modular MacPro is just going to use Thunderbolt 3 to expand and not be a new cheesegrater with PCI slots.
And it really begs the question if it is time to move to Windows. I really hate windows compared to Mac OS, but I want choice, I want an NVIDIA card and from the whole Mojave fiasco it looks like that is not happening.