> The important metric: how long does your entire development feedback cycle take, and what portion of that time is spent waiting on your compiler?

> So far, we haven’t lost much in the switch. The type safety we gave up hasn’t been noticeable in any concrete way yet, especially considering our test coverage has never been better.

Moving to Python means you'll have quicker compile times but now you'll need a bigger test suite which will take longer to run to get feedback after code edits? In TypeScript, you can compile and execute without waiting on type checking, an option like that would help?