alt Hacker NewsI would agree a full rewrite of word which is very complex and take quite a bit of time.
It would be impressive of AI to make a 80% rewrite, though I fully doubt it would cover the 100% rewrite (disregarding long term support as well).
Why do you think it’s impossible for humans to rewrite word, especially even humans made it in the first place?
I think it's not possible with humans in a relatively SHORT amount of time (let's say 1 year).