I was previously going to mention the decentralisation that could be provided by micro-grids as a mitigating factor, but don't know enough about how they work t

I was previously going to mention the decentralisation that could be provided by micro-grids as a mitigating factor, but don't know enough about how they work to know whether it's just replacing one vulnerability for another, but your mention of home batteries reminds me that, with micro-grids, it should be possible to narrow down to a single household "island" level of granularity if all households have solar and batteries (and the same argument for apartment blocks at equivalent scale). Ideally, this allows for each individual unit (household, apartment complex, commercial building) to bear the costs of the "reserve assets" at the same time as being able to take advantage of them down to that granular level - as long as their battery is able to hold out and their solar able to recharge it. And the reserve assets being smaller, fit better into a manufacturing scenario as there should be a more consistent, less surge-style, demand.