A common ingredient in medicine until the 20th century was — yuck! — human remains.
The remains were most commonly ground up into a fine powder that could be made into pills or stirred into drinks! People thought that ingesting a certain part of the body would help to cure illnesses in that part of their own body. For example, crushed skull powder was believed to cure headaches.
If we used hovercraft instead of wheeled vehicles, we would not have to waste tens of billions every year building and maintaining roads; we would just need a few guardrails here and there to protect landscaping. And no need for spreading salt and brine to melt road ice because the hovercraft would basically treat all surfaces the same, whether lawn or snow or water it would make little difference.
Also, damage from accidents would be negligible, so insurance rates would be minimal.
Not to mention that squashed critters due to tires running over them would be a thing of the past.
So it seems like the Aztecs were ahead of their time.