They originally said it was a cyber-attack, and it then turned out to be a (not insignificant) software update rollout that went tits up.

They lied, got caught out, she is at the top of the chain, this is what happens.

This is the best summary I could come up with:

Along with the network failure which left almost half of Australia disconnected, she was at the helm during a major data breach last year.

The chief executive of Optus's Singaporean parent company thanked her for her hard work during a "challenging period" - pointing out she had improved financial performance despite being appointed at the beginning of the pandemic.

The outage on 8 November left 10 million Australians and thousands of businesses without mobile or internet coverage for over 12 hours.

The failure caused transport delays, cut hospital phone lines, shut down payment systems, and blocked about 200 people from calling emergency services.

Ms Bayer Rosmarin has faced criticism over her response to the incident, including at a Senate hearing on Friday.

Optus had apologised and blamed a sophisticated cyber-attack, but critics disputed that, including the Minister for Cyber Security who said the firm had "effectively left the window open" for data to be stolen.

The original article contains 357 words, the summary contains 155 words. Saved 57%. I'm a bot and I'm open source!

There seems to be a lot of anger at Optus over this I feel it's an extremely complex network in the fact our three telcos have very few outages is somewhat surprising.

Potentially she could have put her media team to better use regarding the lack of information on the day, however I feel it's a shame for her to step down over this.

A lot of the major anger is coming from businesses and government and to be completely honest…

If the system your business or government agency has implemented requires 100% up time and relies on a cellular network or any network or power grid for that matter, guess who’s responsible for ensuring that there is adequate redundancy to insure a outage does not occur or is very unlikely to occur…?

Ding ding ding that’s you, you are the one responsible, or the person who you had design it and set the standard and enforce it…

Business and government agencies/services implemented systems with a single point a failure to cut costs, when I absofuckinglutly guarantee that a network engineer brought up that maybe they should add redundancy and was shot down by bean counters.

And now that it’s blown up in their fucking face they have turned around and are trying to redirect attention from shareholders and the public back on to Optus.

Optus fucked up, but no more than if a power line came down when the power company had one of their trucks back into it and the power went out.

If people are going to die if the shit you are designing doesn’t work, or you business is going to loose tons of money, that’s your responsibility to design and implement something that does not have a single point of failure.