The article states that the sharp drop in reserves was being “investigated,” and that it is “suspected” that a large power plant stopped working. Is observability of Texan infrastructure so poor that the _power company_ doesn’t have a comprehensive view of _which power plants are operational_?
It sounds like they're dancing around what may be a social issue; ERCOT sent an email asking people to "conserve", within 30 minutes they saw a negative impact. Is it possible some recipients saw the email and took the complete opposite action?
Bank/toilet paper rush style.