That&#x27;s still a huge majority of PCs. The self-built PC has always been a bit of a market anomaly; people don&#x27;t have self-built Macs and self-built cars are a truly tiny number.<p>And I&#x27;m working on the assumption that this would have applied decades ago, when there weren&#x27;t quite so many viable alternatives to the PC and Microsoft was the terrifying market monopolist.