Why new battery technologies rarely-never appear

This Register article summarizes the situation better than anything I've
seen yet. Goes over all the major alternatives to lithium ion:
magnesium, lithium-sulphur, sodium ion, solid state, etc. etc. We got
lithium-ion thru a confluence of economics (Sony's idle thin-film
factories converted to battery film manufacture) and chemistry.
Looks as though we are stuck with lithium for a while.....
Comments
I did not know that Sony was able to convert thin film manufacturing equipment for CDROMs into manufacturing Lithium Batteries. That explains the relatively (only took a 100+ years of battery tech to get there) quick move into volume production.
-Bill
Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
-Bill