Post-acquisition example: Acquirer has a VP that's pushing the deal. VP makes promises to make the deal seem as attractive as possible (eg: X will improve in Y time). New team is pressured to move quickly. New team uses the honeymoon period to flex all of their political capital. Existing teams get frustrated as their work is de-prioritized/marginalized. Culture clashes happen if new team isn't silo'd from existing teams. And so on...