DTM.4:11 - SoTA-Echoing

Solé et al. (2026 preprint) provide a current example of reinforcement producing multiple stable coupling regimes. This motivates examining establishment and persistence separately; the one-variable construction above is a different illustrative model, not a reduction or empirical validation of that paper.

The historical Katz–Shapiro compatibility analysis (1985) shows why outcomes may depend on other adopters. A gain comparison does not supply an adoption process. The worked adapter construction adds its own explicit event rule and leaves stronger dynamic claims open.

The pattern uses existing mathematical stability and continuation methods. Its contribution is the linked subject inquiry from rare growth through maintained regimes to feasible return.