There are two aspects to this issue:
(1) Many gas/petrol stations will disappear and it seems likely that many do not have a succession plan to address the change over. Plus, the expense of removing underground fuel tanks to convert the property to other uses.
(2) At some point, gas fueled vehicles will become a smaller part of the market and there will be fewer and fewer gas stations. It seems likely that we will still be using some gas fueled vehicles, boats, lawnmowers and other small engine items, for at least 20 years past 2030 to 2035. With fewer and fewer fuel stations, obtaining fuel will be harder and more expensive.
Many petrol stations will close over the next 20 years, accelerating the shift to electric cars.