I'm just saying that the first Apple blessed eGPU was actually Sonnet's eGFX Breakaway Box, which has a replaceable card, and a Vega version. Apple used to sell the 580 version to developers, and it was the first officially supported breakout box on their support pages.
So the Blackmagic eGPU is not the first they've endorsed, and the first one they did endorse had a replaceable GPU. As far as I know the Sonnet one is just as Apple blessed as it was before the Blackmagic one.
I read what you said. You said that the Blackmagic one is the first Apple blessed one, and you thought that was because it had a soldered GPU. That's wrong on both counts.
Apple was still demoing with the Sonnet at WWDC this year too, both with Vega and the 580.