Since 1991 I have ridden 456,000 miles on 5 bikes, none of which had chain drive. In that time I have not experienced a single problem with the final drives, the sum total of my maintenence being the changing of the final-drive oil at the specified intervals. I wonder how many times I would have had to check chain tension, adjust the chain, clean and lube the chain and change chains and sprockets in that mileage?
For me it's a no-brainer, chain final drive belongs on on either vintage bikes or bikes that are not ridden very much.
And that's why I am disappointed that Honda did not see fit to engineer shaft-drive on their new 'tourer'.
I would have agreed with you 100% about shaft drive until I bought a new chain drive bike with a modern spec chain for the first time in a couple of decades.
I am now a born-again advocate for chain drive. They aren't anything like as bad as they used to be!