I'm not sure which of you need to hear this, but:

If you push yourself to your limits and burn out for a company, you are trading years of your future productivity for minor gains in the present.

Burning out will fuck you up , it's like brain fog or depression, and it takes years to recover

Overexertion burnouts, I realised, come from the negative emotions that arise when we do too much, too fast. We accept more work than we can do, and fail to take the breaks in our working day that we require. We sprint all the time.