I do believe a very awkward conversation is going to be had where the company asks me to do my old job again.
Getting lots of emails with the theme of “but who can do this now?” And “but without you
Doing this we will fail”
“Can we have your draft work for this?”
Sure, even highlighted some important questions that need answering. Not all of them. Didn’t get time for that but you will figure that out.
Ah, the old "we didn't know what you did, assumed it wasn't important and only now you are no longer doing it do we realise its critical nature" manoeuvre