I wish I shared your optimism, but for fossil fuels to become irrelevant in ten years we’d need to ban the sale of ICE cars and fossil heating today. Not to mention industrial uses of fossil fuels.
Heating is slower to change, but new homes and buildings could come with solar walls and ceilings.
Newer cars are driven further than older cars. There's a site with data on the Norweigen transition. That shows the average EV is now driving more miles per year than the average gas/petrol, phev or diesel car.
Replacing cars that don't get driven much is less important than replacing taxis and delivery vehuckes and super-commuters. Luckily the economics seems to already be there for that.