Fast chargers were not very good, six years ago. Moreso if they weren't Tesla. Most were 150 KW but many more were much slower. If they weren't Tesla, then they had the wrong end so many EVs couldn't use them. Many, many newer and faster chargers are being installed to replace abandoned ones. WalMart is in the middle of a major push to install fast chargers in their parking lots with the now standard NACS end. Tesla continues their build-out and several major companies are installing modern fast chargers in more accessible places. 
EV expansion and adoption continues in the US. Higher fuel prices for ICE vehicles are helping speed EV transition.