> I should know bc I have a whole house battery and solar system

This is not really a qualification to speak on how the grid works, at all.

Actually having panels on your roof doesn't give you unique insight into how solar panels operate - there is extensive data out there, any PV installation can become a data source trivially.

> The reality is that battery/solar requires major quality of life and activity time shifting trade-offs.

One residence powering itself is not representative of how the grid works, and is not a good way to evaluate any power generation technology whether its PV, coal, nuclear, etc.

I'm actually trying to accomplish what the author is describing, so I have experience to talk about the difficulty of its implementation (unlike the author himself, who has zero experience with its implementation to speak of).