Whether right or wrong, I think it's good to keep in mind that Apple has, by far the highest quarterly profit and total asset value, compared to any of these companies - it really is a giant among giants. Alphabet certainly has an excellent future outlook (reflected in the markets), but its current financial state still pales in comparison to Apple.
Taking this into account, I figure Apple thinks twice and thrice before joining industry consortiums and partnerships that they didn't initiate themselves. This would be straightforward posturing/strategizing on their part, and probably doesn't reveal too much about the current state of their R&D in Machine Learning. It's unfortunate that things are this way, but nothing unusual from a "game theory" perspective.
Taking this into account, I figure Apple thinks twice and thrice before joining industry consortiums and partnerships that they didn't initiate themselves. This would be straightforward posturing/strategizing on their part, and probably doesn't reveal too much about the current state of their R&D in Machine Learning. It's unfortunate that things are this way, but nothing unusual from a "game theory" perspective.