Prospects for $K_{L}\toπ^{0}ν\barν$, $K_S\toμ^+μ^-$, $K_L\toπ^0 \ell^+\ell^-$ and $\varepsilon^{\prime}/\varepsilon$ after the new $K^{+}\toπ^{+}ν\barν$ result from NA62

The recently announced NA62 measurement of the $K^{+}\toπ^{+}ν\barν$ branching ratio, based on 2016--2024 data, is fully consistent with its very accurate Standard Model (SM) prediction. While it is not excluded that the final result based on 2016--2026 data will deviate from the SM prediction, the