Thanks for catching. I have replaced (here) the “$E_\infty$-” by “homotop-commutative”.

]]>added a brief section (here) on the original “Conner-Floyd orientation”

$\array{ M SU &\longrightarrow& K \mathrm{O} \\ \big\downarrow && \big\downarrow \\ M \mathrm{U} &\longrightarrow& K \mathrm{U} }$ ]]>