Per Pacific Gas and Electric (PG&E), San Diego Gas and Electric Company (SDG&E) pioneered the PSPS approach in California, and over time, through enhanced technology and other measures, they have been able to reduce the total impact of PSPS events.
SDG&E has been able to isolate shutoffs to narrower areas than is presently possible with PG&E's electrical infrastructure. However, SDG&E has yet to be able to entirely eliminate the PSPS as a tool.
PG&E, likewise, hopes to decrease the impact of PSPS events, over time, and they are taking proactive measures in their maintenance work to harden their grid and reduce the need to proactively shut off power. Techniques known to limit fire risk, such as undergrounding of wires, are also being employed in new infrastructure development, when feasible.
Learn more about the PG&E Wildfire Safety Program.