credence of these two outstanding physicists. Namely, $HTSC$ is realized in a sandwich-structure but the pairing is due to an high-energy ($\sim90-100$ $meV$) *oxygen optical phonon*. This (experimental) discovery will certainly revive discussions on the role of the electron-phonon interaction ($EPI$) in $HTSC$ cuprates and in bulk materials of the $Fe$-pnictides (with the basic unit $Fe-As$) and Fe-chalcogenides (with the basic unit $Fe-Se$ or $Te$, $S$). As a digression, we point out that after the discovery of high $T_{c}$ in $Fe$-pnictides a non-phononic pairing mechanism was proposed immediately, which is due to: $(i$) nesting properties of the electron- and hole-Fermi surfaces and ($ii$) an enhanced (due to ($i$)) spin exchange interaction ($SFI$) between electrons and holes [@Hirschfeld-review]. This mechanism is called the *nesting SFI pairing*. However, the discovery of alkaline iron selenides $K_{x}Fe_{2-y}Se_{2}$ with $T_{c}\sim30$ $K$, and intercalated compounds $Li_{x}(C_{2}H_{8}N_{2})Fe_{2-y}Se_{2}$, $Li_{x}(NH_{2})_{y}(NH_{3})_{1-y}Fe_{2}Se_{2}$, which contain *only electron-like Fermi surfaces*, rules out the nesting pairing mechanism as a common pairing mechanism in Fe-based materials. In order to overcome this inadequacy of the $SFI$ nesting mechanism a pure phenomenological “strong coupling” $SFI$ pairing is proposed in the framework of the so called $J_{1}-J_{2}$ Heisenberg-like Hamiltonian, which may describe the $s$-wave superconductivity, too. However, this 