A lot of automakers built their manufacturing platforms around Lithium.
In order for “early adoption” on newer technologies, it is going to cost big bucks to revamp the assembly lines.
5 - 10 years. The next phase of technology will be the injection into the market. Annnd I don’t know if Lithium will go away, it will be a secondary system, like gas is to battery now.
Don’t forget, Lithium by far has the greatest energy density, hands down to all others(except for nuclear).