The size of the battery packs/acceleration ability/range are all tradeoffs. American EV companies are currently in competition for all of these things, resulting in 9000 lb vehicles with 1000 HP and 0-60 MPH in 3 seconds.
Obviously and historically, Lexus does not feel it needs to compete for bragging rights. 0-60 MPH in 5.2 seconds is more than 99% of owners will ever need. But remember, solid state batteries may make lithium batteries look like the old carburetors of ancient times. I'm hoping to wait 2-3 years to see what bubbles up to the top of reliable and non-self-igniting EVs.