Top 3 major technical drawbacks of dog-propelled transportation versus motorized vehicles:

1. Car engines stopping randomly every 20 minutes to take a dump.
2. Right Tire attempting to slice Left Tire’s throat (helped by both Rear Tires) and subsequently putting it out of use for the day.
3. Rear Tire repeatedly trying to procreate with Front Tire (no immediate use, as far as replacement for Left Tire is concerned).

In conclusion, and despite the important huggability factor (very low for your average out-of-the-box Aston Martin), I would say that dogsleds are very unlikely to regain a dominant position in the transportation sector.