I'm not saying that it won't work - but I'd be very surprised if it was well optimised for any vendor other than Intel. This in and of itself is not proof that

I'm not saying that it won't work - but I'd be very surprised if it was well optimised for any vendor other than Intel. This in and of itself is not proof that they are operating in bad faith; if they provide clean interfaces and reasonable default implementations that's all that can be justifiably expected of them. The question of good faith actually only comes into play when another vendor provides their own optimised implementations and creates a pull request. How will the project maintainers respond? Even getting to that point requires a trust based buy in to the project from the other vendor. Given Intel's history of toxic behaviour in competition I think they need to do far more than they have done (and are likely to ever do) to earn that minimal baseline of trust.