> It's often cheaper to buy storage at today's (relatively high) prices than to continue to size the transmission infrastructure for peak demand

Electricity billing is fundamentally flawed: Industrial users will pay a demand charge according to their peak usage, when they should really pay their contribution toward the local/regional/national utility's peak usage.

Residential customers may pay a time-of-day generation rate, but still pay a flat per-kwh rate for transmission and distribution. All 3 should be time-of-day, at the minimum. Wires sag more when you use them during the hottest part of the day and when they're already running hot. Upgrades need to happen to handle peak usage, not off-peak usage.