Battery tech is improving at around 10% a year. Lithium Battery density has tippled in the last 10 years people on hacker news like to comment on how new battery technology has not done anything but since those comments started a decade ago battery density has trippled.
If it's improving at a rate of 10% per year, a 2x would take 4-5 years to achieve so a 2X is really a good improvement. I wonder where we'd be right now had we not gone the ICE route.
https://cleantechnica.com/2020/02/19/bloombergnef-lithium-io...