So what are the typical attributes of a normal user? AFAIK, everybody who doesn't need an expert to care for his system, would be capable of installing and runn

So what are the typical attributes of a normal user? AFAIK, everybody who doesn't need an expert to care for his system, would be capable of installing and running one of the more popular and user friendly Linux distributions. If you need an expert anyway, it doesn't matter much which OS you use. The only exception I can think of are disabled people, who might rely on very specific software.