And come to thing of it, I've seen it play out in Product Management, Design and even C-level suites.
Obviously, those in higher positions have more experience recognizing lack of alignment so they "part ways" sooner rather than later.
(that's pure speculation: my MO is to start looking for the exits as the company threatens to grow past 30, with the aim of being long gone by the time it goes past 100)
It's extremely rare that both will exude similar approach to collaboration and compromise equally (and perceive it as equally) to keep a stable business relationship.
That's just human, and what enables things to move forward (other option is death by commitee).