Analog TV was NTSC or PAL. NTSC was 27.333? something frames a second ( cause the US thought exactly 30 would cause bleed through between frames and PAL was 25 frames a second.
You are looking at this the wrong way. The monitor and the graphics card agree to communicate at 60hz, but that doesn’t mean the graphics card will sent 60 new images each second.
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Shows even at a ‘consistent’ frames per second, within a given time slice, some frames take a lot longer to draw than others. Back when GPU were less powerful, this was acutely pronounced when you would see a 60 FPS timeslice consist of quick frames taking 1/10th of total drawing, and a few ‘hard’ frames taking 9/10th of the time. Humans would see this as a ‘tear’ or a ‘stutter’ in the rendering.
Performance is not dropping, complexity is increasing. The new station interiors cause my laptop GPU to go into overdrive, I can hear the fans start to spool up within a few seconds of docking.
With no way to turn off these new environments ( apart from disabling the whole interface ) its wholly the fault of CCP not providing enough granularity in the graphics settings so a machine can be appropriately ‘tuned’ to run well.