Skipped through Leo Gibson's video. Just the same thing as all the others. Possibly an advantage that you can as well record vocals if you have a suitable set of headphones /w headset mic.
Otherwise, I would actually prefer it if all these things came with an input jack and a strap mounting option. Heck, there could be an additional "plug me in straight" adapter as well. Not only that I have zero trust in the longevity of those foldable plugs, with a stock input you could as well just place them anywhere. I really don't want to drag my laptop off the table just because the damn thing is connected via USB with me forgetting about it for a while.