Nothing of value loss, the youtube app on Roku is very glitchy and the entire ecosystem of Roku is very ad supported and user hostile. I would expect voice commands within the youtube app to stay within youtube.

I am 50/50 on youtube music/youtube, but youtube app includes music so it's a general hard to decipher request but genereally if I want to voice search while I'm in youtube, I want it to stay in youtube.

I don't understand why people flock to it/use it.