Hacker News Reader

Twitter (and others) had an algorithmic feed long before LLMs.

These don't actually seem like "good reasons" to me.

Before using large language models, they used language models. Large language models perform better, at the cost of being more expensive to run.

They bought a lot of GPUs. They could still do these things on that hardware with someone else's model.

They could use other people's models running on their hardware while renting most of the existing capacity to others. The real issue is that their leadership is delusional and their stock is literally based on this shared delusion and acknowledging reality would gut their ability to raise new funds and destroy paper wealth based on delusional returns that are never going to happen.