That propped up 10x engineer always working overtime, is really a 10x*0.3 bus-factor engineer. Team members can each be 3x engineer with significantly improved

That propped up 10x engineer always working overtime, is really a 10x*0.3 bus-factor engineer. Team members can each be 3x engineer with significantly improved bus factor (though not without investment and some coordination). The funny thing is that 10x engineer drains mindshare from the teams, rest of the org, and will lack diversification, like architecture, testing and Ops.