Odd-genus normalized limit conjecture for orientation-reversing stretch factors

Let $S_g$ be the closed orientable surface of genus $g$, and let $\delta^+_{\mathrm{rev}}(S_g)$ be the minimal stretch factor among orientation-reversing pseudo-Anosov homeomorphisms of $S_g$ with orientable invariant foliations. The notation $g\to\infty$ with $g$ odd means that the limit is taken through odd genera.

Odd-genus normalized limit conjecture.

$$\lim_{\substack{g\to\infty\\ g\text{ odd}}}(\delta^+_{\mathrm{rev}}(S_g))^g=1+\sqrt{2}=\text{silver ratio}.$$

The source derives this as a predicted consequence of the odd-genus polynomial formula. The limit remains open because that formula is itself conjectural.