We have no idea what the code looks like. Maybe some knowledgeable engineers took a look at it and figured it would be better in the long run to just design an

We have no idea what the code looks like. Maybe some knowledgeable engineers took a look at it and figured it would be better in the long run to just design and build something new themselves, instead of inheriting someone else's hairy, warty code. (I am just offering ideas here, I don't actually know how hairy the code is or how many warts it has.)