Re: Slaughtering the golden goose as usual
"We only got to the scale we have today because the Net was open and accessible to all."
That's arguable. Some would say it was the commercial interests that drew the masses to the web in the first place: turn the Web into the next Sears Catalog, for example. Well, that and porn, of course.
Point is, money still talks, so if you tried to keep the Web open, commercial interests would simply "fork you" and go their own way, like they have with Flash and so on. Even if Flash were to disappear, they'll just enforce something else in its place, and do you think you have the cojones to take on the mass of customers that regularly use Google, Amazon, Facebook, etc.? IOW, what you describe would happen anyway, only in a different way, and since the masses follow the commercial interest...well, let's just say, you're outvoted.
"The next step is self-evident: prioritisation of DRM content. Bye bye Net neutrality."
Google has already shown the way to beat Net Neutrality: private nets. As soon as it's financially worthwhile to do it, all the big Net companies will start deploying private nets to shortcut their way around the Net. Net neutrality soon becomes inapplicable because they can bypass most of the Net. Why do you think the likes of DHL, UPS, and FedEx keep their own vehicle fleets? Same thought process.