At one company I joined, the team that came over in an acquisition years earlier still said the deal didn't feel closed. They kept their own stack, their own login and their own way of working. On paper it was one company. To customers it was two.
I've seen some version of that at four companies across four industries. Every growth plan assumed the products would work as one, and making that true was the real work. Organic growth creates the same gap when products built by different teams never become one platform.
Closing that gap is what I do now, for funds and the companies they own.