not only is the relative availability/value of OW miles better than *A/ST, but first world english speaking countries that operate F cabins are disproportionally represented in OW, with AA/US, BA, QF, and to an extent CX.

For *A in F, there's a lot of asian representation with OZ, TG, ANA, LH/LX (hard to book), SQ (can't book unless using SQ miles), UA (lol), and CA (not as appealing). a lot of "good" (either quality or destinationwise) *A carriers don't have very good J availability (NZ, SA). And now that UA has a devalued chart, and US miles aren't an option, there's not a lot of great value.

Finally, ST probably has the worst F availability/points value...there's a reason why most points bloggers are OWE, some are UA 1K, and the rest...so that leaves like deltapoints and frequent miler as the only DL plat/diamonds?