Most companies flat out made us use Windows workstations, even though 100% of our work was developing for Unix/Linux and not for Windows.
Another company allowed Linux workstations but only CentOS, and we were stuck with 6 until years after 7 was released.
Finally there was the company that let me use whatever software I wanted, but had fixed-height desks that were simply too low to fit my knees underneath. Aside from that, it was the best place I've ever worked, but I had to quit after less than a year because my posture was getting noticeably worse just from having to use that desk.
Now I work at home and everything is set up perfectly. I'll never go back to an office, even though I have to give up more than half of my potential income to work at home, it's just not worth it.