It is cheaper - wind, solar, hydro + geothermal means high availability and uptime
The 'solution' is battery storage - with the advent of LFH and saltwater batteries, it is cheap, effective and safe
Window mounted heat pumps work great, and don't require roof space
So, no to all.
Disclaimer: I work for a smart-grid company. But I'm very much involved in utility-scale solutions for these exact problems.
You are an electrical engineer - what is your field? Do you work on consumer electronics or are you actually involved in grid and power reliability? Because our clients include a bunch of utilities and we are moving massive amounts of battery, that will, in fact, precisely address the reliability issue.
Tl;dr 'No'