Windows 7 is becoming ubiquitous and offers a simple software RAID solution within the OS. Modern desktop Linux distros have good software RAID capability as well.
But mid to high end motherboards still ship with fake RAID chipsets.
Responses to an old post mostly recommend the Windows RAID over the fake RAID, and this post mostly says there is no advantage to fake RAID.
So why are these multi-billion dollar hardware companies wasting money developing and building fake RAID chipsets?
Do situations exist where the fake RAID is useful or even desired? When would you ever want to use the motherboard's on-board RAID?