Then part of the skill of being a "10x" developer is avoiding working with incompetent PMs and devs. There is no way to achieve outlier successes in an environment like that.
What if simple success would do? I think that delivering an high quality end result within budget and scheduke is much, much more important than being übercompetent 10x developer who only works alone.
To be bloody minded, what happens if 10X says: "Why use RoR for an API-only app with no database when you could go with Sinatra? Or even serverless?"
And all the <10X devs on the team say "But we know RoR."
Then it's a cost benefit analysis of whether retraining the team to adopt a 'better' tool is worth it. Sometimes it's blindingly obvious that you shouldn't be inventing a wheel when there's a wonderful library that'll do it for you, most of the time it's not so simple.