I consider built-in buffering as a huge win. * For example python gives you buffered by default streams. It's an amazing DX. * In case of Zig you as a develop

I consider built-in buffering as a huge win. * For example python gives you buffered by default streams. It's an amazing DX. * In case of Zig you as a developer should be explicit about buffer sizes. * You could opt-out to unbuffered any time. * Allows for optimization without leaky "composable" io stack.