Of course it isn't necessary. It's just extremely useful. Of course it rewrites history, and I abhor rewriting shared history, but it's extremely useful to be able to rewrite your own private history!
Well....but you literally said above that there's a need for it. In a somewhat condescending tone. And now it's suddenly obvious that it's not necessary? Okay.
It's possible to have a need for something even though that thing is not necessary.
"Oh man, I really need a nice dinner right now" is impossible for you unless that dinner consists of the absolutely strictly minimum necessaries of nutrients in a gray tasteless slurry? Come on.
