I think vast majority of game developers, no matter single or not, use visual studio. Tools like GPU/CPU profilers/debuggers are easier to use when part of the IDE.
> Tools like GPU/CPU profilers/debuggers are easier to use when part of the IDE
Says you. There is reason vim is not "dead" and it's not just cause "old people" still use it. Also, there are plenty of IDEs besides VS.
Finally, "vast majority" doesn't matter for shit with open source. One developer with an itch is enough. If there's a handful of others with same, all the better.