Mass adoption of centrally controlled devices doesn't change the paradigm of reasoning about computing freedom, though. This trend just means that the majority of computing devices aren't under the control of their owners, not that the idea of computational freedom is irrelevant.

In fact I would say barring some very strong laws that make de facto locked down devices outright illegal, there will always be more proprietary devices than libre ones. One of the chief goals of locking down computers is decommodification, meaning taking what could be a general purpose device and restricting it to one specific purpose. Even caring heavily about software freedom - I've got two librebooted desktops, two me_cleaned laptops, one microG phone, but still countless purpose-tailored devices that perform some proprietary function. If those proprietary functions (eg Google Voice SIP integration) could be straightforwardly done with libre software, then I could just consolidate those functions into the libre infrastructure.