> predictable subsystems that are reliable, are well-understood, have clear boundaries and tolerances

I'd add with reliability, boundaries, and tolerances within the necessary values.

The problem with the TV remote is that nobody has given a damn about ergonomic needs for decades. The system is reliable, well understood, and has well known boundaries and tolerances; those are just completely outside of the requirements of the problem domain.

But I guess that's a completely off-topic tangent. LLMs fail much earlier.