A. If you want to hop you can already just create a new account. What’s the issue with taking ownership of your posts with you?

B. Just migrate the salt, too. A server can have per-user salts, which may be migrated together with the hash.

C. If you already have control over someone else’s account, what additional benefit does migrating serve?

I’d be like “Oh boy let me get redirected to lots of useful answers to my question next time too”.

I don’t understand why you would frame that as being “slapped”. Does having your question marked as a duplicate hurt your feelings?

Isn’t it a good thing if your question is marked as a duplicate? That means you now have lots of answers readily available which already answered the question.

In Javascript you can do let a = undefined, defining the variale a as undefined.

A significant difference to defining it as null is that typeof null == "object", while typeof undefined == "undefined".