Yes, I know this. Doesn't change the physics of my statement though. It's an "every little bit helps" type of comment. I don't see them ever releasing this at 24/96k, which would substantially help the stretch algorithm, but until then, I'm looking for a realistic step up in quality. That's all. Upsampling for YouTube is really a 'farting into the wind' kind of idea, considering how YouTube will again otherwise mess with your audio.
So I'm looking for a practical quality improvement.