After work, it was time to check, if the speed of a new laptop is worth it.
I ran fiberdesk, which mainly used single-thread power for calculations despite being multi-threaded, in two different scenarios.
Rate Equation and SRS:
Intel i7-5500U 2.4 GHz: 454 sec
AMD EPYC 7551P 32 Core 2 GHz: 374 sec
Intel i7-7700 3.6 GHz: 209 sec
Intel i7-8565U 1.8 GHz: 206 sec
and nonlinear Schrödinger equation solver (Intel MKL based FFT):
Intel i7-5500U 2.4 GHz: 51.7 sec
AMD EPYC 7551P 32 Core 2 GHz: 54.7 sec
Intel i7-7700 3.6 GHz: 29.5 sec
Intel i7-8565U 1.8 GHz: 28.1 sec
So my current laptop is slowest and the new one is the fastest. Time to move to the new one!