It doesn't seem like it should have been catch-22, @jsha posted Help thread for DST Root CA X3 expiration (September 2021) on April 6th. To me it feel a bit like the theater is on fire 
and people are yelling fire yet not every got out of their seat until the flames actually reached them. The issue being the web world as a whole didn't take on all the duties and responsibilities to be ready for this expiration; the LE community did do due diligence on address and informing the powers that be.
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