Would you buy a single core AMD for £300 if it beat the 10900k at single-thread/single-core performance, and would that make it great value at one quarter the price?It out performs the i9 10900k at times at half the price. Not sure thats too expensive unless you are only comparing it against the 3000 version.
Because there sure are plenty of places where the 10900k out-performs a 5600X, as you know. There are also plenty of cases where a 5950X and a 10400 and a 5600X all perform exactly the same.
The trouble is, everybody here is using different metrics to suit themselves.