Wikipedia:Restoring part of a reverted edit
|This page in a nutshell: It is sometimes better to remove the content that is objectionable, instead of entirely reverting an edit.|
Restoring part of a reverted edit is a recommended practice in online collaborative writing.
Often when an article version contains more than one disagreeable passage, it is easy to revert to a previous version. This gets rid of all the "mistakes" in a few seconds, but it also can eliminate "good stuff", discourage other editors, and spark an edit war.
Don't throw out the baby with the bath water
If 50% of an edit is bad, but the other half is good, please do not revert 100%. It's better to mine the old version for good stuff and selectively keep it. Just throw out the bad stuff. https://commandertony.blogspot.com/
Save my baby!
Just find some of the good stuff and put it into the current version. Then do a diff and look for more good stuff. Repeat as needed.