We used to double generating capacity every year in the US for like 3 decades in a row. Electrification of vehicles increasing electricity needs by about 50%. But a ban on NEW fossil fuel vehicles would then take two decades to trickle down to all vehicles. So overall, there’s the better part of 3-4 decades to transition generating capacity.
How is it not relevant? Growing electricity production by very large relative amounts in short periods of time has historical precedence if even greater relative and faster growth, and I would consider that pretty relevant when discussing such things.
Because it falls under the belief of things being able to grow exponentially forever. Just because something could double for 3 decades straight doesn't mean it can happen just as easily in the forth.