Running Win10 and Stellaris just doesn't want to play ball.
First up running DirectX version is just non-functional. It loads up the main menu the first time, allows you to try to start a game, then when loading the game it'll freeze on "loading gfx maps".
After that it'll fail to load at all and freeze when clicking on the New Game button or the Multiplayer button from the main menu.
So after about an hour of searching I found that it possibly works with a very specific driver (17.9.3, a beta driver at that!) and then only a slight possibility. Seeing as I use features of the latest drivers it's an unpleasant process to load up old drivers just for a game session.
Then I found that I could make the game function via the -opengl tag on the game. Ran that, however it crashes without fail around 1.5hrs into a session.
This of course is frustrating but less so than it not working at all. Paradox so far have responded with only comments of "This is a known issue for a good bit of games with AMD Drivers. We have no control over it."
DxDiag is attached for reference.
AMD ThreadRipper 1950x @4.0GHz
AMD Vega64 on 18.2.1 Drivers
Samsung B2450 1080p Monitors (2)
ASUS ROG Zenith Motherboard
Corsair AX1200 PSU
Corsair Dominator 32GB 3200MHz DDR3
OS: Win 10