One derailed freight train has made it impossible to travel between the Southern Highlands and Sydney by rail since Wednesday lunchtime, and the line is not going to be open until at least 10AM Friday. As someone who relies on this service, it is maddening.

English Premier League broadcaster Optus considers selling sports streaming business to Nine.

“This agreement is a victory for sports fans in Australia and around the world,” News Corp chief executive Robert Thomson said ... I disagree, a new company buying up rights is just likely to make it worse in terms of having to subscribe to multiple services. Hope they leave the football alone, but I doubt it.

Robyn Denholm rose from obscurity to become the highest-profile Australian in business. But overseeing Elon Musk, as Tesla's chair is no easy thing. I spoke with Robyn and several people who have worked closely with her for this article. Grab a cuppa as its a special AFR Christmas long read.

@TrainLinkSouth They have not, they are all cancelled and passengers are standing around with no information

Sydney-based venture capital firm Airtree Ventures has closed the majority of a $650 million capital raising for two new funds to invest in technology start-ups, attracting new institutional investors from the United States and securing money from three Australian superannuation funds.

Alphabet, Meta, Apple and Microsoft were sold off after their artificial intelligence-laden results calls, but Amazon had a better story to tell (or told it better). My thoughts after listening to earnings calls.

WiseTech Global chief executive Richard White says he has not lost focus on running the logistics software giant and will not stand down amid a growing personal scandal.

There are big fears that AI deepfakes could be used by foreign enemies or political operatives to influence elections Just how worried should we be? I've been having a look as people test the line between satire/jokes and disinformation.

Australian design software giant Canva is facing a backlash from business customers slugged with hefty price increases, with some plans going up by more than 300 per cent.

AustralianSuper, the country’s largest superannuation fund, has been forced to write off more than $1.1 billion in equity and loans tied to American tech firm Pluralsight, marking it as its single worst investment in venture capital. It remains committed to investing in VC, private equity and tech though.

@Cheffrey23 Only in Aus ... they haven't launched the service elsewhere yet. It was a trial

@Serrels

Australian software design giant Canva faces a formidable new rival in its fight to win business customers ahead of a highly anticipated IPO, after Microsoft launched a new app that puts design tools in the hands of its enterprise clients.

The professionals who understand most how social media and other tech platforms work are keeping their own children away from them for as long as possible.

Now that's depressing.

Revealed: The Albanese government’s giant bet on US-based quantum computing firm PsiQuantum involved an equity investment of $US125 million ($189.5 million) with the rest of the $470 million deal comprising debt.

Publishers are steeling for a battle with Google, over the use of AI to summarise content taken from their websites in search results. Thanks @mrwillhayward , @Bruff & @sorapark for talking me through their concerns, and scepticism about Google's methods.

Honey Insurance has landed the third-largest ever series A funding round for an Australian tech company – $108 million – after nabbing market share from less innovative incumbents by using AI and smart home sensors to bring down premiums.