My cousin recently went to a weeks-long class and got zOS certified. He's been a sysadmin at a university for years, and they don't use zOS there at all. But I

My cousin recently went to a weeks-long class and got zOS certified. He's been a sysadmin at a university for years, and they don't use zOS there at all. But I think he did it just to learn the system and have some career insurance. I was fascinated that people are doing this.