Good to hear from you, Johann. There are so few of us it's troubling when anyone falls silent. It's true, incomprehensibility is not in itself damning. 2001 I'd argue, though, has a higher kind of incomprehensibility than Interstellar's, the latter more a matter of fudging and trying to say too many things at the same time than of Kubrick's offering great mysteries and deep imponderables. See what you think. It is a movie you need to see, and find out if it's the Nolan you love or the one who leaves you cold. Or something in between.