Well, I'd love to see that happening in my lifetime (I just turned 40, so that leaves like 30-40 more years for some breakthrough to happen). For now it seems that the technology is simply not there yet.
EDIT: All of that is to say: I'd like for our policies to be based on the actual technology that we have, not on wishful thinking.
But, also, we have to plan for tomorrow. We can predict with some degree of certainty how technology will develop. Tomorrow's computers are likely to be faster than today's; so we'll build a broadband network which is capable of exceeding today's demand.
It's the same with electricity. Nuclear has had decades to prove itself and come up short every single time. Solar and wind are exceeding expectations. Battery technology is rapidly evolving. Should we base our decisions on today's technology or tomorrow's?
https://www.ecodirect.com/FranklinWH-FHP-13-6-kWh-AC-Battery...
Tell me again how this technology hasn't happened yet?
$3600+/year.
Great investment, and no more power failures. But also, OP said this technology doesn't exist. You're pivoting to it exists but you can't afford it. Different question.