This camera is for a growing population. Lots of people vlog. Heck, I have friends who post every meal and every drink they have on vacation. If Nikon makes the Z30 user friendly and upload friendly, then it will make money.
It would good for Nikon if you are correct but most of the young people I know are glued to their iphones for everything including vlogging.
I was on holiday recently and I saw a few photographers all in the plus 50's age bracket. I did however see one younger lady maybe about 30 ish with two D6's dangling from her neck. I thought to myself that is a rare sight for someone so young.