I actually saw a little excerpt of a video interview that I failed to find to give you the link where he was asked about his current project. He showed a stack of cards that became Ada and talked about the main theme being passage of time

Ryan Holiday shows his index card system in a few videos, including this one: https://www.youtube.com/watch?v=dU7efgGEOgk

I also often think of the passage from Pirsig's Lila where his box of index cards gets upended upon return from the bar.

Shuffling zk (Zettelkasten) cards is just fine. [1] The meaning of a note is largely determined by its connections, and so approaching a note through a different set of connections gives it a different meaning. Finding new paths uncovers new meanings, which is at least one of the zk points. Shuffling cards is one way you might find new paths.

[1] If you have physical cards you are destroying the default hierarchical path if you shuffle them and that could be a pain in arse to reconstruct, and your ability to find a note with physical cards also depends on the hierarchy. Digital cards have different problems.

i had a second reading, and i am convinced it is the greatest work of Art. a lot of people, myself included, bit the ruse that Kinbote was some parody of a mad man and ignored everything but the poem. but the notes have the most beautiful verses in the history of literature, even more beautiful, far more beautiful than the poem.

spoiler: it is just one mind (solipsism). it deals with all kinds of dysphoria, especially gender and temporal (age). Nabokov misdirects away from psychoanalysis with the Freudian hate, but the Jung anima/animus and shadow are obvious. for historiographical background, Nabokov's brother died in the Holocaust where he was taken for being homosexual, and dealt at the time with both the Red and Lavender Scare of McCarthyism. there is a full stanza in the poem about Shade shaving his/her leg. and the, depending on context, hilarious or melancholic references to the loss of "crown jewels". references to "complications of an operation" as well. it is plausible that all of this is a product of Aunt Maud's dementia, where we see Maud's "handsome" lover (older woman) and patron welcomed by Shade in his birthday.

the "dual" in dual blue is in the context of chess puzzles where there are two solutions when one is ideal. indeed the novel was set up to show a most brilliant set up of stealing the "Pale Fire" of the poem into the "Pale Fire" of the novel with notes, and this still holds regardless whether it is all Professor Botkin and Kinbote his mind's reflection in the "mirrorland" of Zembla (which is the pre-Soviet Russia in Nabokov's head that no longer exist).

to me, of all Pale Fire derivatives such as Infinite Jest (a nod to lifting a title from Shakespeare) by Wallace, Gravity's Rainbow by Nabokov's student at Cornell who in a previous work "borrowed" Nabokov's Sebastian Knight, and Danielewski's House of Leaves, Danielewski succeeds in emulating Nabokov's most delicate romanticism above a semiotician's sensibilities, especially in exploring the archetypal in the architectural through Bachelard and Derrida.

but after my second reading, none of its echoes could compare to the original arrant thief.

if you are open to other forms, as someone who is a disciple of Godard and Kubrick, who organized viewing and discussion of 2001 with students and faculty, i can say that the animated work Sonny Boy is a direct adaptation of Pale Fire (i.e. a solipsist dysphoria) and surpasses the masters of cinema and animation (Shingo Natsume's mentor is the peerless genius Masaaki Yuasa) with his cinematic "grammar". i am on my phone and will update this with references from the book once i get my laptop (i only use hn with my phone).

i wish i could quote Kinbote's diss on those who read the poem and stopped at that. after my second read i felt completely bamboozled and could hear Nabokov's prerecorded snorts echoing through time just to ridicule my myopic mind.