And there is what I’m “missing” so to speak. What @Lionellyyn said insinuated that you could get roughly the same Sol/s as overclocked memory or close to it by doing what you’re doing. That’s not actually the case. The reason people are overclocking memory is because it gives a Sol/s boost. So it’s actually incorrect to say it doesn’t mean anything. Underclocking your memory is nice for sure if you stay at stock hashrate at lower temps and lower power usage. But that’s the opposite of what most people overclocking their memory are after.
So to conclude, yes overclocking memory does indeed add Sol/s and does not “do nothing”.