“Always listen to experts. They’ll tell you what can’t be done, and why. Then do it.”
― Robert A. Heinlein, Time Enough for Love
“Everything is impossible until someone does it.” ― Robert A. Heinlein
Not saying that it’ll absolutely never happen, just that the time never seems to arrive. That’s why I’m skeptical of these predictions. Some day one might come true, but I’ll believe it when it actually happens.