Viable for adv touring awaits battery tech to improve pretty dramatically.
Local rides are now practical, some off road and trials bikes...but range and charging speed still needed and to a degree charging stations.
A Gold Wing has enough space and weight for a decent size battery pack. If the Ducati 18kWh battery pack weighs 110kg (and that's not state of the art, by the way! that's Chevy-Bolt-era storage to weight ratio - makes me suspect that Ducati is sandbagging their claims) then a bike the size and weight of a Wing ought to be able to handle double that, if not more.
Charging stations are going to be showing up everywhere over the next few years.