$previous_job allowed us to pick. One of my coworkers had to replace his laptop, and I convinced him to try out Linux this time. I handed him the bootstrap script and he was back to working by the afternoon.

Our CEO got wind of this and said as a matter of policy everyone is switching to Linux unless they have a good reason (needing excel for financial reports is a good reason). The two new hires who had been setting up their dev environment for over a week at that point were the trigger for this.