[Const-me]

Choose OpenGL 3.3, you’ll loose gamers running Windows on Sandy Bridge GPU.

Choose Direct3D 11, you’ll loose Linux gamers.

Are you sure in absolute numbers, there’re more people in the second group?

[shmerl]

Modern engines will use Vulkan anyway.

[Const-me]

Maybe they will, maybe not.

Before it happened, software developers need to choose whichever GPU API works best for their particular project.

Personally, I have not developed games for several years.

For the last 1.5 years, I’ve been working on a CAD/CAM software. Traditionally people use OpenGL for this area. I have picked D3D 11 instead. The renderer is reasonably sophisticated; there are many complex shaders in there. The software is now used by thousands customers worldwide, and yet there were very few rendering-related bugs so far.