I managed to get it working at a good framerate with dgVoodoo 2: http://dege.freeweb.hu/dgVoodoo2/dgVoodoo2.html Because I have a widescreen monitor the 3d graphics were stretched until I manually specified 1920x1440 resolution in dgVoodoo config settings. So at least there are workarounds to get it working.
Win 10 Pro, Nvidia 2080 Ti, i7-9700k, 16GB RAM.
Actually, that's very interesting that its working fine on your system. My older rig has a GTX 980, too, and I still got slow performance on 1.03 but good performance on 1.04. My laptop has integrated graphics and runs fine on 1.03 so I assumed it was an issue with new cards. My Windows 7 machine with a GTX 670 runs 1.03 at solid 60 fps.