It's all about the chipset hardware and drivers, which are not standardized across the PC world. Some people don't care about Bluetooth, and they want to pay le

It's all about the chipset hardware and drivers, which are not standardized across the PC world. Some people don't care about Bluetooth, and they want to pay less for their boards, so manufacturers oblige them. On a PC, you have to pay extra for decent wireless performance. On Apple Macintosh you pay extra always, whether you want it or not, but you get consistent quality in return.