Great summary. I would add that at a BigCo, you can survive business failures by changing teams or getting reassigned, often moving upward in the process if you're motivated to do so. Failures could include a toxic boss or co-worker, a failed project, or even your own mistakes.

At a Startup or SmallCo, you do the same thing by changing employers.

I started my career at a SmallCo, and am now in my 20th year at a BigCo.