They have. Only out-of-date, naive fools continue to promote the "explosion" risk of CNG tanks.
First, CNG is not as combustible as gasoline (1200F vs 600F)
Exposure to CNG is not dangerous, even if inhaled.....unlike gasoline.
CNG is lighter than air, which means it rises and dissipates quickly, unlike gasoline which puddles.
The design of the cylinders is subject to a number of "severe abuse" tests such as heat and pressure extremes, gunfire, collisions and fire. The systems are also fitted with valves and other safety devices to prevent leakage and eliminate the risk of an explosion - actually making them safer than the legal requirements stipulate.
Finally, a small rupture in a pressurized tank prevents ignition. It is the same reason why LPG tanks from your grille do not explode when pierced and exposed to fire....until the pressure is so low that it burns off the remaining product.
Most truck companies already have proven, safe CNG vehicles in their lineup.
Get up to date information and stop dwelling in the past wives tales of CNG.
I think with the Honda CNG you can buy a home fill kit IF you have NG available at your home.
Until someone invests in the infrastructure and car mfgs. make them more available, I think the Honda CNG is only available in CA and CT, we won’t see them in other areas. I wonder IF they can add CNG tanks at existing gas stations?
My husband, who grew up on a farm, remembers when almost everyone who had a tractor ran it on LP.