Gasoline sale is already plummeting by up to 30% a year some places in Norway. The people who drive the most are the first to convert to EVs since the economics make more sense for them, and newer cars get driven more than very old ones. So EVs will soon dominate the number of miles driven and thus the impact on fuel sale will be larger than you'd think.
By 2025 I think you'll start to see gas stations closing down in Norway. By 2035 you'll see the same across Europe. You'll still have gas stations here and there. But it's not going to be as close and convenient as it is now. Even just a few gas stations closing down will get people to panic about whether they'll have a local gas station in the near future. Who will want to buy a new ICE vehicle in that situation?
Sure, there will be some enthusiasts. But not enough that it's worth thinking about.