It isn't a plan, it is simply progress.
What progess? I have made this point before. Gas is about $1.95 a gallon where I live. My car has about a 15 gallon tank. I can drive up to the gas station with a near empty tank, spend less than 5 minutes at the station, spend less than $30 for a fill up, and be on my way for another 400 miles. What alternate energy plan even comes close to that?
You want to know when humans will stop using fossil fuels. When all the fossil fuels that can be extracted at a reasonable price have been exhausted.