I wonder how important the word "live" is there. Does this statement only apply to real-time decryption of ongoing meetings?
I think yes: they lack the technical infrastructure to decrypt the meeting in real time (which totally makes sense), rather than they have no plans to buid any infrastructure to decrpyt it afterwards (which cannot be guaranteed against a hostile actor).
And how long of a delay counts as no longer "live"? After the meeting ends? Five seconds? A millisecond? Does the latency to the server mean it's not "live", since it happened in the past?