12th gen is a very significant leap! You'd be surprised of the performance per core per Hz.
The i3-12100 compared to a i9-9900k has 20% better perf with 1 and 2 core loads (like Arma), few % with 4 core load and then it falls a bit behind.
About the same up-to 4 cores with 11700k.
(A source: https://cpu.userbenchmark.com/Compare/Intel-Core-i9-9900K-vs-Intel-Core-i5-12400/4028vs4122)
Next bump would be with every price jump, 12400 which adds 2 cores, per core ~same, then there's 12600k - from which onwards there are also efficiency cores, and each core is a bit better, not 12600 (without K, that one doesn't).
