The SATA power connector isn't that great at high currents, look at the numerous fires. Fan controllers have moved to that because most modern PSUs have a lot o

The SATA power connector isn't that great at high currents, look at the numerous fires. Fan controllers have moved to that because most modern PSUs have a lot of them laying around, that's all. And the board-side connector is literally a PCB edge with gold fingers, so it's cheaper. The Mini-Fit Jr connectors seem fit for purpose, but I don't like how stiffly they stick even after releasing the latch. And they're sort of tall, depending on what you're doing. I'm a fan of Micro-Fit 3.0, and the single-row variants are available in enough positions that you could have a low-profile connector delivering plenty of reliable power. I think the dual-row would be more appropriate for most applications though. They're cheap enough, though the tooling isn't.