It is debatable whether DDR5 has an advantage over DDR4 in gaming (if anything there might be a regression depending on the frequency and timings). Also, the scores for the 5600X are not done in Windows 11 but Windows 10. And the performance regression of Zen 3 on Windows 11 is
up to 15% not necessarily 15% across the board. In fact an investigation done by Tom’s Hardware
here shows the regression to be much smaller (and in 3 of the 7 instances instances there was even a performance uplift, one of it +4.8%).
As for AMD cpus being one year old this is on AMD, not on Intel. This is what AMD offers at the moment and will continue to offer until at least February/March 2022 (and even then it won’t be anything truly new anyway). And AMD is not dropping prices by much since they moved to TSMC. Ryzen 3000 still retails for close to MSRP (10% less at most) even though both the octacore and hexacore 3000 series cpus are losing to both 10th gen and 11th gen Intel parts as well as to AMD's own 5000 series parts. AMD at most will reduce the prices of 5000 series by 15% and even that will be in a firesale way during Intel's launch and then when they release the 3d cache parts. And you will have to thank Intel for that for forcing AMD's hand. Stop being a fanboy and realise that competition is good for the consumer. You should be wanting BOTH Intel and AMD to be at each other's throats. That's what pushes innovation and drives performance per dollar higher.