If we're giving testimonials, I'd say it's been critical to our success as a startup. Very early on (~2012) as a small team were able to put together an MVP without a lot of boilerplate, and sane defaults baked in. I was able to be immediately productive, but also fill in any knowledge gaps on the implementation over the years along the way. We're still able to maintain that code base with a still relatively small team today, though we've gone through several upgrades.