60fps complaints go back to the dark days of 360/ps3 ports where HD resolutions on the consoles meant high framerate was no longer a viable option there. Since AAA games started using console as lead platform pc became saddled with 30fps caps as well. It possibly happened even earlier, but that was the time where I started noticing it.
It’s wild how many people who do not have mods published on nexus/workshop/bethesda are happy to speak on the behalf of modders.