It’s a bit similar. However this goes a bit further than I understand those projects do. They’re creating a game like the original. With this decompilation project, if you use the N64 compiler you will get a ROM which is 100% identical to the original.
When I migrated emails last time, I setup my old email to automatically forward to the new email. Then on my new email, I setup an automatic label for any email that was addressed to the old address. Every week or two I’d review what was sent to it and either update the email address used or unsubscribe. Eventually it got to a level where I wasn’t getting much at the old email anymore and finally deleted it.