Apple has a very low tolerance for reputional liabilities. They aren't going to roll out something that %0.01 of the time does something bad, because with 100M devices that's something that'll affect 10,000 people, and have huge potential to cause bad PR, damaging the brand and trust.

I think this is exactly the holdup with Apple Intelligence. No rush to ship a Beta.

(Ok, I suspect this is one of the main problems.. there may be others?)