Depends on the circle you walk in? I've seen many drift away from Mach and never return :-)

People spend many years working with Windows, they then give linux a go and expect to be up ad running in the same comfortable manner as what they are used too. I work with Windows as a software performance engineer, even i have to use my good friend google to see how to do things under linux. So i do understand why people loose interest very quickly, plus the fact that a lot of programs do not look all glitzy. This is because they are mostly built with a practicle nature and no bling.