According to Geekbench there is only about a 50% performance gain with Intel i7 CPUs since MacBook Pro Retinas from 2012, am I the only one that is surprised about this - Moore's Law and all? https://browser.geekbench.com/v4/cpu/search?q=macbook+pro
I see just 10% gain, and I don't see any reason to upgrade unless the logic board fails on my 3.5 years old laptop.