That may be true but in an industry that produces millions of new computers every year there's quite a bit of room for outliers. After all someone has been buyi

That may be true but in an industry that produces millions of new computers every year there's quite a bit of room for outliers. After all someone has been buying all these specialised expansion cards for all these years. Graphics, sound and networking may have been the biggest reasons and may now be adequately catered for in everyday PCs without the extra hardware. However the high end of all of those markets still needs more than what you get on any basic motherboard and processor and then there are all the speciality cards as well catering for who knows how many niche markets.