When you are testing out new themes and plugins WP Reset makes it so easy to revert back to a known position. Load up test data, then wipe it. Reset site back to standard or any stage from the snapshots.

I could have done with this a long time ago. You may still want separate environments while you are testing but you should still have WP Reset on each environment. It is such a time saver to install your core plugins from the collections too.

It would be good if there was a migration feature as well to save on installing another plugin but this does what it does very well.