I love solar, but this "those who can afford microgrids can shield themselves from blackouts" paired with net metering where "the wealthy get paid a premium for excess generation and can buy expensive high-demand power back at a discount" probably aren't steps on the path to improved grid resiliency for any definition other than this weird "no island-wide outages" definition.
Net metering is gone in most of California (for new solar). I think it's going away in general. Distributed solar supports a more stable grid for everyone (per UL 1741-SB requirements).