Once I'd reached the point where I could squirrel away more than 30 digits a minute in memory palaces, I still only sporadically used the techniques to memorize the phone numbers of people I actually wanted to call. I found it was just too simple to punch them into my cell phone.
With 'Brick' there was the Dashiell Hammett influence, and with 'Brothers Bloom' there was a really strong Fellini influence - both those movies wore that on their sleeve.