The beauty of language is that it is fluid, and we don't have to agree with language changes for them to happen. "Qs" is a commonly used abbreviation with no ambiguity amongst those using it. It is akin to "Ks" among baseball fans. K of course is a less intuitive abbreviation, however there is no ambiguity in its use in a baseball context. It is one of the great strengths of language that it can change over time. The words change, the rules change, the very structure sometimes changes. Embrace the fluidity! Language is best thought of as a glacier vs a static pile of ice. Upon returning to it at any time, you can expect it will still be there but things will have moved a bit, and many assumptions should be reverified. It doesn't mean there can't be rules, rather that the rules will slide with time, usage, populartlity and such. And language doesn't care much about those who try to enforce the rules, any more than the glacier will stop at a fence.