[ShinyRice]

Being kind or not doesn't affect the quality of their software. If anything, I'd say they're strongly opinionated, something that seems to be in very short supply these days, and at times it's something to appreciate and welcome. If you want proof, such communities still draw an audience, just look at OpenBSD.

[jdub]

Kindness really does improve the quality of software. Look at the answers to "Why Rust?" in today's Stack Overflow post. The Rust community is opinionated, inclusive, ambitious, and kind, and produces excellent software.