The article seems premised on a misunderstanding that OpenAI is a research lab. For all intents and purposes, it’s a for-profit subsidiary of Microsoft, and there’s little financial incentive for it to maintain old models for others’ benefit.
Finally, even if you don't care about research at all, the article mentions OpenAI's policy that none of their models going forward will be stable for more than 3 months, and it's going to be interesting to use them in production if things are going to keep breaking regularly.
Have they now? What part of the internet relies on LLMs to function? These things are still toys.