I've likely said this before, but at the risk of becoming boring... 😁
Looking back, it will be no bad thing that early expectations regarding Cambois weren't met. The reason I say this is that world battery prices are on spectacular decline (per kilowatt) right now. What looked economic a few months back could easily turn into a white elephant today. There are so many plants now in construction that there's going to be a painful shake-out in the not too distant future. Also, Lithium batteries are rapidly becoming a strategic material: what would the military now do without its modern armada of drones?! Import barriers and local incentives are becoming the order of the day. So if you don't have a large enough domestic market established to take all the output, it's doomed from the start.
It's always nice to be on the cutting edge of new technologies, but those who play with sharp objects... Doing what you do do well still has a lot to say for it. If you consulted Elon Musk on this, he'd certainly say start at the downstream end small and then vertically integrate backwards. Nice that some of this is already going on:-
https://etn.news/energy-storage/rimac-energy-opens-new-bess-manufacturing-facility-in-the-uk