The future is in electric cars. No oil changes, filter replacements, periodic tune ups, exhaust system repairs, fixing water pump, fuel pump, alternator...
Only one moving part thus little maintenance. Just need to develop better batteries. Hopefully those carbon nanotubes will meet expectations.
As for environmental sustainability, we better buy less stuff and repair what we have instead of throwing things away as soon as they break down. How many toys amateur astronomers have nowadays?
