I'm not sure how this applies to 2-10 people startups. And, honestly, once a startup reaches the scale where it has multiple hierarchies of management and engin

I'm not sure how this applies to 2-10 people startups. And, honestly, once a startup reaches the scale where it has multiple hierarchies of management and engineering organization that requires formal training, it's not a startup anymore. It's a different kinda beast... small business perhaps. Not saying informal training isn't useful, it's just not something you'd formalize at a small startup.