Almost every gaming desktop sold in an American electronics store arrives running Windows, and the alternatives remain marginal even among technically confident builders. The reason is a stack of practical dependencies rather than any single decisive feature.
Graphics drivers are written for one platform first
Graphics vendors ship their most complete and most frequently updated drivers for Windows, because that is where the paying gaming audience sits. Other platforms receive later, thinner releases.
A new game often relies on driver work done specifically for it, tuning how the card handles that title's rendering. That optimization lands on Windows on release day and elsewhere afterward, if at all.
Which means a player on another operating system frequently gets worse performance from identical hardware. The gap is not a hardware limitation but a difference in how much engineering attention the platform received.
Graphics APIs accumulated a long history
Decades of American PC games were written against Microsoft's graphics interfaces, and studios built tooling, engines and internal expertise around them. That accumulated work does not move platforms cheaply.
Translation layers can run many of those games elsewhere, and they have improved substantially. They still add a layer between the game and the hardware, and they occasionally break on titles that use unusual features.
A studio choosing where to spend its remaining testing days will pick the platform holding most of its buyers. The history therefore keeps renewing itself with each release cycle.
Anti-cheat systems restrict the choice further
Competitive online shooters commonly use anti-cheat software that inspects the system at a low level, watching for programs that read or alter game memory. That inspection is built for one operating system.
Publishers can enable support elsewhere, but doing so weakens the checks or requires separate engineering. Many decline, and the affected games simply refuse to launch on other platforms.
For an American player whose friends play those specific titles, the operating system question is settled before performance enters it. The games they want determine the machine they buy.
Retail preloading removes the decision entirely
Machines sold through American big-box chains and online retailers arrive with Windows already installed and licensed, its cost folded into the sticker price. Nothing prompts the buyer to consider an alternative.
Changing that requires wiping a working system, sourcing drivers and accepting some loss of compatibility. Most buyers, reasonably, do not attempt it on a machine bought for entertainment.
The default therefore survives even among people who would prefer something else in principle. Defaults are powerful precisely because acting against them costs time that the alternative rarely repays.
The peripheral ecosystem follows the majority
Controllers, headsets, capture cards and streaming software are all developed against the platform that holds the audience, and their configuration utilities are frequently Windows-only.
A player can often make the hardware function elsewhere through community drivers, losing per-device lighting, button remapping or firmware updates along the way.
Each of these gaps is small on its own and cumulatively decisive. The platform advantage is not one wall but a fence made of many low ones.