I think this is hype cycle thinking by the press. Projects start and fail for all sorts of reasons in every company. OpenAI wasn’t exactly a huge company with thousands of employees at the time. Failures happen when you’re trying to build a new market. No big deal.
You can read like 3 sentences on that site before you are drowned with popups.
tldr OpenAI stopped developing Arrakis, a faster version of their GPTs.