It missed us by 9 days

The Carrington event, which would disable technology for months, was actually medium size in view of the sun's longer cycles. CMEs that size happen about once every 150-200 years. Bigger ones, such as the Carolingian event, happen about every 1200-1500 years. A Carolingian size blast would put us down for years. Bigger ones yet happen about every 3000 years. We don't even know how much worse that would be. And the biggest of all may well coincide with the 12ky catastrophe cycle, which is large enough to cause extinctions and trigger the next ice age. It would obliterate all electrical systems. We're near the end of each of those cycles. Bolster the infrastructure? Yes. But stock up on everything you'll need to live without electricity indefinitely. And learn survival skills. Just in case.