Cory Doctorow warned in 2011 of "the coming war on general-purpose computation." Ordinary people being able to control their electronic devices is a threat to entrenched power, both governmental and corporate. Since he gave this speech we've been on a continual trajectory of all the major tech corporations giving users less and less control over the devices they use, both in hardware and in software. It's only a matter of time before there's an attempt to make it impractical to run Linux on a device of your choice.
This is one reason open-source hardware is so important. We need it so there's always some kind of computing device we can run Linux on and tinker with. Otherwise we could be locked out completely in the end.