Huh, I wonder what that'll mean for cross-platform compatibility. As they say in the post, Allegro supports a lot of platforms, whereas if they end up just targeting DirectX 11, that pretty much locks out everyone other than Windows and Xbox, doesn't it?
I believe they support Linux as a first-class citizen, even with removing Allegro! I've had VERY good luck with Factorio running through Steam, on Debian Linux (both 8 and 9). I have also ran it on Mac OSX and Windows 7 without any issue.
That game is so rock-solid as far as stability/system support that I would literally buy it again out of general principal =)