From talking with people who work or worked for the companies you mention: their complaint is never about being on call or about the work hours, but about the s

From talking with people who work or worked for the companies you mention: their complaint is never about being on call or about the work hours, but about the stack ranking system. This means that every manager has to rank the people that report to her in order from best to worst, where best must get a promotion and worst must be sidetracked or fired, even if the whole team objectively ranked from 'excellent' to 'superstar'. This means that you may have to fire someone who performed only 'excellently', and it also makes your direct coworkers competitors, because it's in everyone's interest to be higher in the stack than you, and if someone else on your team does well, this may be a threat to you.