I am no expert either, but I would expect it will take at least ten years to commercialize any new battery technology.
Investments made today into li-ion production would expect to have a return on investment in under ten years, so it makes sense to make such an investment.
Edit: If it were to take less time to commercialize the new chemistry, it would be because it can piggyback off existing techniques. If that were the case, converting existing infra to the new battery chemistry would be possible. So the current investment would likely not be wasted.
Investments made today into li-ion production would expect to have a return on investment in under ten years, so it makes sense to make such an investment.
Edit: If it were to take less time to commercialize the new chemistry, it would be because it can piggyback off existing techniques. If that were the case, converting existing infra to the new battery chemistry would be possible. So the current investment would likely not be wasted.