Another possibility: it's true far more than 1% of the time, yet that's not enough reason for the acquirer to make the same decisions as the previous owners would have.
The acquirer can be amazing, care deeply about the mission of the acquired company, and see it as aligned… and after a year or a few years, decide that it's not the best use of their resources. The difference doesn't need to be that the acquirer isn't amazing or doesn't care; often, it's simply that their decisions have different inputs.
Another possibility: it's true far more than 1% of the time, yet that's not enough reason for the acquirer to make the same decisions as the previous owners would have.
The acquirer can be amazing, care deeply about the mission of the acquired company, and see it as aligned… and after a year or a few years, decide that it's not the best use of their resources. The difference doesn't need to be that the acquirer isn't amazing or doesn't care; often, it's simply that their decisions have different inputs.