The irony is these vehicles (like the Beetle also) are symbols of the hippie counter-culture.
Setting aside general gasoline engine issues (in other words, all things being equal)…these are terrible for the environment. A modern internal combustion engine (ICE) will produce far less pollutants than these heaps.
These heaps spew fumes, have no A/C, are shitty in pretty much every respect. Nah, I’ll keep driving my 2016 hatchback.