The discussion around SAF often compresses a complex industrial system into a single fuel percentage. That hides the real constraints.
A chain of dependencies
Production pathways depend on different combinations of feedstock, renewable energy, hydrogen, carbon sources, financing and logistics. A shortage or price shock in one element affects the entire value chain.
Decision implication
Airlines and policymakers need pathway-specific analysis rather than generic volume targets. The relevant questions are where, from what inputs, at what lifecycle performance and under which contractual structure each tonne can be produced.