That's an awful lot of money that you're proposing people spend in order to cover a rare occurrence. Of course there's day-to-day value in having all of that which a backup generator cannot provide, but in a power outage, you'd probably rather just have the cheap gas generator, and maybe a $1000-ish "solar generator" (i.e. battery pack with inverter) that you can use to load-shift the generator. Run the genny during the day to charge the battery; run the fridge, lights, and phone charger from the battery overnight.
vs
EV => $8000 - $40000
Bidirectional charging infra => $2000 - $5000
PV => $5000 - $15000
Heat pump => $5000 - $10000
That's an awful lot of money that you're proposing people spend in order to cover a rare occurrence. Of course there's day-to-day value in having all of that which a backup generator cannot provide, but in a power outage, you'd probably rather just have the cheap gas generator, and maybe a $1000-ish "solar generator" (i.e. battery pack with inverter) that you can use to load-shift the generator. Run the genny during the day to charge the battery; run the fridge, lights, and phone charger from the battery overnight.