It should be mentioned that electric motors allow for designs which can drastically lower drag. See NASA X-57 Maxwell for instance. But it will take quite some

It should be mentioned that electric motors allow for designs which can drastically lower drag. See NASA X-57 Maxwell for instance. But it will take quite some time for that to translate to commercially made planes. I think the key to electric flight is just a rough doubling of battery capacity, along with finishing the R&D around new designs like the X-57. Nothing that's out of the reach in the near future. A doubling of capacity can be achieved with lithium using either solid state electrolytes or silicon anodes. There's a decent chance that something like that will reach mass production in the next 10 years.