We are now at t+26h. Please compare how much we knew about the xz-attack after less than a day with what we know about the chain of events of giant outage yesterday.
If something similar had been caused by an OSS component, we would see congress discussing a ban on open software in critical infrastructure already.
Do you remember Wanacry?
And? We are not talking about malware here.
Although I guess congress probably did ban Wannacry.