When my management chain was busy doing everything but listening to engineers, and then tried to do the engineering themselves. A real moment of clarity happened and I realized they were determined to fuck up badly and cost the company money, 8 months of work, and possibly put us in an unrecoverable position.

At another company, we were bought by a private equity firm. There's only one way those transactions go, and I wanted to be first out the door rather than compete for jobs with thousands of other engineers.