If you want to lose all of your user settings, create a new user account and nuke the old one.
If you want to replace various bits of the system, reinstall the OS.
These are different scenarios with different use-cases, and I'd argue it's a much worse idea to conflate the behaviours, as in certain other OSes, than OS X's fault for properly treating them as separate operations.
If you want to replace various bits of the system, reinstall the OS.
These are different scenarios with different use-cases, and I'd argue it's a much worse idea to conflate the behaviours, as in certain other OSes, than OS X's fault for properly treating them as separate operations.