I went from 2017 Intel to 2024 M3 Max

I had problems with Homebrew and some apps installed through it (crashing). I couldn't compile one DLL. I had to reinstall Command line tools. Deleted one electron app - couldn't be bother.

I also noticed two binaries (one was Python) running in x86 mode via Rosetta. It was slow. Another reinstall. You can check Kind in Activity Monitor (apple/intel)