There is a bit of humor in my question, but I'm also somewhat serious about it. If you were one of the 1% with multiple homes across continents, varied business and social interests, more than one ex-spouse and a large brood of offspring, I just can't imagine you'd really have time to put together, maintain or upgrade multiple high end systems. Do you think the Larry Page has the time to audition and evaluate power cords?
You land at the airport in your Gulfstream, helicopter to the compound and you're looking for a few hours of relaxation before you have to leave to host a group of ex-Presidents for your football team's game at the new stadium. You can adjust the VTA/SRA for yourself, but at the very least someone on your staff should have checked the bias on the output tubes.