when E6 film is very hard to buy in Europe through the official channels. That said, somebody always manages to get some film somewhere.
This may be Eastman having to deal with widely variable demand. on of BFC videos on Flic Film Chrome 100D metioned that he (Dave) had trouble at first getting Ektachrome 5294 100D from Kodak, and then he COULD get some. he was then able to place a larger order..
one item was the producers of the HBO series
https://www.kodak.com/en/motion/blog-post/euphoria/ decided to use 5294 to shoot on Cross processed Ektachrome. And I undertsand that that is "Trendy" at the moment.I suspect that that order may have been for more 5294 than Kodak was expecting to sell. So they may have been rationing stock.
I do notice that Atlanta Film company has been selling respooled 5294 as Euphoric 100, no doubt inspired by tha show.
and I agree with Matt, Kodak has fairly new machines to perforate and spool motion picture camera stock (BH Perfs and KeyKode bar codes) . which is normally only sold in 400 and 1000 ft lengths. Lab and print stock is also run with KS Perfs in 1000, 2000, and 6000 ft lengths. Bulk still film is done of differnt machines as it has the still frame numbers and those older machines are proably much less productive. It is not clear from the "Smarter every day" video if the cassette finishing machines also perf the film, but that 1000 ft or more rolls that those machines need could be perforated on the New style KS perforator wuth the edge print turned off - as the cassette machine also prints the Still film information of the film as the cassette is loaded.