First I’ve heard anyone say this. FWIW, I experienced no issues, and I’ve been using migration assistant since my first (well, second, I suppose) Mac (I recently found an old config file dated 2007!).
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)
