I think this is why some people people make distinctions between desktop, workstation and servers. AV, CAD and such may very well benefit from RAID 0, but aren't necessarily in this discussion because those are often considered workstation-type tasks. Games and office apps are generally considered desktop uses.
One person I know that sets up video editing systems puts the OS & software on its own drive, and stripes two drives together for data. I think he does striping for capacity, and not speed.