Even if he benchmarks on the website could be trusted, I don't see how saving a little bit of memory and running processes will make any difference on a gaming

Even if he benchmarks on the website could be trusted, I don't see how saving a little bit of memory and running processes will make any difference on a gaming computer. Memory and running processes aren't the bottleneck. Definitely not worth the trouble of running some custom third party OS modifying software. If it would be aimed at making old computers useable for office work longer, then it might make sense but not on a computer used by gamers.