Useful is relative. Silly little toy aps? Sure go full auto, heck, i personally do. However, these will fail catastrophically or have failures that should never even have happened.

So, in professional environments, full auto is negligent to a point i hope it becomes a fireable offense. Like trusting lane-assist and adaptive-cruise in a car to handle full auto driving. It might even seem like it can, until the leading car disappears, until it hits a t intersection. You get me? Modern llms are lane assist and adaptive cruise, not full self driving. It frees up some of your headspace and attention but not all, in fact not even most of it.