I'm lucky. Where I live (metropolitan population 1 million, Western Canada), the major dealers for BMW, Honda, Kawasaki, Triumph to name a few, have demo bikes OF SELECTED MODELS. I demo tested a 2019 BMW R1250RT and a DCT Gold Wing Tour before voting with my wallet and buying the DCT Tour.
Oddly, I'm one of those motorcyclists who don't need to ride before I buy. The new DCT Tour is one of the few bikes I've test ridden before buying (because I was a VERY satisfied owner of a '14 BMW R1200RT, and it came down to choosing between the new RT or new DCT Wing.)
As a matter of fact, I've bought most of my bikes without test riding, including: '14 BMW R1200RT, '12 Moto Guzzi Stelvio NTX 1200, '07 Gold Wing, '04 BMW R1150RT, '03 Honda ST1300A, '97 Honda ST1100A. And you know what. I LOVED EVERY SINGLE ONE OF THEM!
But I certainly understand those who need to try before they buy.
Tim