Comment by LeifCarrotson

Micron/Crucial is the 3rd largest manufacturer of flash memory, most of the other brands in your list just make the PCB and whitelabel other flash chips and controllers (perhaps with some firmware customization, but they're usually not responsible for implementing features like FLUSH).

Toshiba/Kioxia is another big one, but they're based in Japan. The US brand could be Intel instead of Crucial, I suppose.