Actually, you're not exactly correct as the modern hardware hasn't gone too much forward in terms of performance. Although, power consumption per FLOPS has gone down quite significantly.
sir, if we r talkin about mining, even the GPU's who's been produced last year is just nothing comparely to the new one
"Sir", I might be mistaken but I haven't seen any GPUs during this time period with performance boost over 10%. As of now, manufacturers are optimizing their technology rather than mass-producing new one.
Of course, if I'm wrong, please provide me with the information on that, thank you.