Not even sure how its a "follow up" as it has nothing to do with the Iron-Ion battery. Lithium is lighter & more energy dense and will take more chance.

I think where you're coming from is likely something like this Lithium battery steals the press thunder from the Iron ion battery. It's likely the Lithium battery will be used in portable, vehicle applications and if it actually has any benefit the Iron would could be used to store surplus electricity for the grid.

No it doesn’t sorry. The India battery only survives 150 cycles and the iron batteries are heavier than lithium.

You can say the same about various miracle drugs before they under go trials.

Iron might be the future for some energy storage applications (e.g. home batteries) but can't compete for other applications (e.g. Automotive).