Roughly: OpenAIs don’t employ enough jarts.

In other words, the groups of folks working on training models don’t necessarily have access to the sort of optimization engineers that are working in other areas.

When all of this leaked into the open, it caused a lot of people knowledgeable in different areas to put their own expertise to the task. Some of those efforts (mmap) pay off spectacularly. Expect industry to copy the best of these improvements.