The people bringing up the practical issues of this thought experiment are missing the point, and that's assuming those considerations are valid in the first place.
Mice given access to a button that provides a direct dopamine shot to the brain would rather continuously press the button than walk away for 5 seconds to eat so they don't fucking die. They had to be removed from the cage periodically just to keep the things alive.
Anyway, back to the main premise of this exercise: I see this as basically the moral equivalent to suicide. The only real difference is one implies removing yourself from the world to avoid some form of suffering and the other is doing much the same except it's for acquiring untold amounts of pleasure. The existence of such a machine would make for a great suicide alternative, but I don't think the wider range of non-suicidal individuals would enlist for something so permanent.
As for myself: maybe in 50-60 years time when I've pretty much outlived my purpose anyway and I'm just counting down the days until I die. But even then, it's debatable whether I'd do it if the option were put forward to me. As the saying goes: the only guy who wants to live to be 90 is an 89 year old. All the grandstanding about not wanting to be an old fuck go out the window once the time to make the decision comes.
