[larsonnn]

But is this trade off not a little bit to much?

It reminds me of Twitter or other companies which starting to change programming languages for performance reasons.

[randomdata]

Is testable code a tradeoff too much? That cannot be answered globally, only locally. That's why we have engineers, after all. You could eliminate the entire profession of engineering if "which tradeoff is best" could be answered broadly without deep understanding of specific circumstances.