Warning: anecdata. Nearly every traditional small/medium business with Windows machines has an onsite domain controller and Exchange server. Any store with com

Warning: anecdata. Nearly every traditional small/medium business with Windows machines has an onsite domain controller and Exchange server. Any store with computer cash registers probably has a Windows server in the back that they're talking to. Ditto for card access control systems, parking garage gates, some elevators, some HVAC systems. Every doctor's office, chain retail store, car dealership, and cube farm is likely serviced by at least one Windows server (and also likely a Cisco PBX running IOS). Linux is dominant for web backends in tech companies, and has some penetration among large non-tech enterprises for Java apps, but there is really a staggering amount of Windows out there in the non-tech world, and Linux is not the default server platforms often as you'd think. (Plus enterprises may be less hip to virtualization, and run larger server counts for similar workloads). Rust belt cities have vibrant Windows Server consulting/service ecosystems that spend a few service hours a month on a given small business. Those companies have maybe one or two techs who did a little bit of Linux once.