It's temporary. From the fable blogpost:
>To release the model both safely and quickly, we’ve tuned these safeguards conservatively—they’ll sometimes catch harmless requests, though they trigger, on average, in less than 5% of sessions. With more capable models arriving in the coming months, we’re working to improve our safeguards and reduce false positives as quickly as we can.
Sure. IMO a lot of people will not touch fable again. The risk is to high. If they don't want the model to be good in some field they shouldn't train it on it.
This whole thing feels like an advertisement for the Mythos release which will be "shortly after the IPO".
They had similar messages on Opus, they never fixed or relaxed the topic-related safeguards there. I doubt they will here, either.