Stallman: I'm less concerned with what happens with embedded systems than I am with real computers. The real reason for this is the moral issues about software freedom are much more significant for computers that users see as a computer. And so I'm not really concerned with what's running inside my microwave oven.
Again, I'm happy if people find GNU/Linux useful for that. If some companies finds it useful in a microwave oven I'll say, "That's nice." But I don't think that's where the social and political issues arise. Those arise where the computers are visible to the user as computers. We can load software into them. We have thus the possibility of sharing and changing software. And then it becomes a significant question whether we are allowed to do so or whether we are blocked from doing so.