We should be focussing on making websites work better and faster on mobile instead of inadvertently supporting an effort that allows one provider to discriminate while shaping the web in its favour.

WP do better if the web is more open, diverse, independent and decentralized. I know it's just an optional plugin but it encourages a situation in which if a site owner wants to stay independent and keep control over their users' experience of their site they now are at a disadvantage as Google prioritises sites that opt in. This gives a tech giant even more influence at the expense of everything else.