LPG is a petroleum product and it has nothing to do with CNG.
So you're telling me I don't need to store compressed gas in my car, or pump it with a sealed pressurised system from pressurised tanks, which is only available at a fraction of retailers?
There are many CNG cars on the market (even an Audi A5), that prove that this technology is usable. And the infrastructure is well developed in many regions of Europe, but the big issue with CNG is that is hard to put a hand on its distribution from geopolitical point of view and here the things become very complex
I'm not doubting the usability of the technology in principle, however it's worth noting that most (all?) of the CNG cars on the market are duel-fuel, so they are in effect closer to being plug-in hyrbids, just without the ease, commonality, or low cost of refueling the secondary powersource,
I mentioned that I liked the idea of Biogas, one of the reasons for that is that it
should remove geopolitical issues as it can be generated pretty much anywhere where there is civilisation,
if we're still dependent on the politics of nations that have to drill for it, I go back to my original point - it's non-renewable and non-recyclable (and still may push out as much CO2 as diesel in it's common applications).
I'm not against gas , just as I'm not against petrol/diesel, or Electricity, or even Hydrogen..
(and I'm a BIG fan of CH3NO2) as a means to power cars, each has its relative advantages and disadvantages... however the one thing electricity has going for it that the others don't, is that
whatever the generation method, the car can still use it ... Wind, solar, hydro, tidal, geothermal, pig-shit, human-shit, rotting organic matter, landfill off-gassing, sedimentary carbon rocks, crushed liquified dinosaurs, breaking atoms, joining atoms.... ===> ONE type of car, one fuelling infrastructure... so as I said before, the balance will only shift more towards EVs, and that will bring with it the benefits (and drawbacks) of those things as they arrive.