[nine_k]

It looks like the team greatly enjoys using Rust, but it makes the process of writing the software slower, due to more time spent writing GC-less code, hunting for or writing missing libraries, etc. That is, velocity goes down, even if the probability of bugs and the enjoyment of the team both go up.

[pitaj]

I didn't get that impression. Also when calculating velocity we really should include the time it takes to iron out bugs. Rust has a lot of features (sum types, pattern matching, etc) that result in your program being more likely to be correct, not just memory safe.