The moat
Residual x86 ecosystem and government backing. Process IP once fortress-grade, now contested. Switching costs exist in servers and PCs but AMD and ARM have already collected the rent.
Pain, risk, or retraining required to leave.
The product gets better as more people use it.
Patents, data, licenses, process knowledge, regulation.
Fixed costs spread over a volume rivals cannot match.
Structural ability to be the low-cost producer.
Pricing power from trust, habit, or identity.