The web is the least free of all platforms from the users point of view* so I find it bizarre that Berners-Lee would use the 'freedom for users' angle to try and convince people to switch to web technologies. I fully support the idea that we should have root on devices we own, it's just a shame he had to dilute that point by pushing his own platform.
* nearly always closed source, in the rare cases where you have the source you can't modify the code that actually runs when you use the service, usually no control or even ownership of your data, it runs on a machine you don't control which can make your data subject to mining by foreign governments or advertisers
* nearly always closed source, in the rare cases where you have the source you can't modify the code that actually runs when you use the service, usually no control or even ownership of your data, it runs on a machine you don't control which can make your data subject to mining by foreign governments or advertisers