Face-Off: Best Nolan Composer

I always like Hans Zimmer in general, but looking at this poll I can't help but wonder, why Christopher Nolan stopped working with David Julyan that often. 

But that's just me and I'm obsessed, among other things, with close collaborators who were there from the very start or almost very start. Like, if you look at David Lynch, right from the start he often cast Jack Nance (until he died Nance was only absent from a Lynch feature film once), collaborated with Alan Splet on sound (there are notable gaps, but overall they last collaborated just before Splet died in 1994, doing a stereo mix for theatrical re-release of Eraserhead), Jack Fisk and Catherine E. Coulson (yet again, collaborations of different kinds were there since early shorts and until she died in 2015). I really wonder, why in some cases friendship+collaboration bonds last until one of the persons dies and some just die off. Latter always seems like director at least partially forgetting one's own roots and shifting identity in favor of more commercial projects. Not that it's bad or anything, just a sad sight for me personally.