I've always thought the UA header should just be removed. Sniffing is a bad thing and analytics on it are mainly used to preemptively decide not to use features

I've always thought the UA header should just be removed. Sniffing is a bad thing and analytics on it are mainly used to preemptively decide not to use features that you should just use feature detection for (and for tools like Google Analytics comes from the js lib not the UA header anyway). Plus it's so many wasted bytes.