I think this would be a good replacement if a few years for the NT. Heck I be old and feeble by then, and could use the extra wheels.
https://www.cycleworld.com/2019-Yamaha-Niken-Three-Wheeler-At-EICMA-2017
https://www.cycleworld.com/2019-Yamaha-Niken-Three-Wheeler-At-EICMA-2017