I have just has a look at the petapixel link and unless he has edited it then at best Fuji was not at pains to point out that the steady decline in demand was Japan only. It might easily be read as a steady decline worldwide.
pentaxuser
No, it cannot at all be read as a decline worldwide because
both 3-packs have ever been Japan only products, which have never been offered by Fujifilm worldwide!!
Two small Japan only niche products without any relevance for the worldwide market.
Due to my Japanese source (my film distributor there) Premium 400 has been described by Fujifilm as a film which "renders normal Japanese skin tones better". It's a special product, and in global terms a niche product.
By the way, from my latest journey to Asia I know that the latest hot beauty trend there is having very bright, white, pale skin. People are protecting their skin from the sun, using cosmetics for that etc. Maybe that trend is also coming to Japan? Maybe the look of this film does not fit the preferences anymore? Who knows......I am not into beauty trends, I am a hopeless case with my look.....

.
Is Kodak making a film which renders 'US-American skin tones' better? No. Has Agfa made a film for 'German skin tones'? No. Has Ferrania made a film for 'Italien skin tones'? No.
But Fujifilm has one for its home market. And non-customers from overseas are complaining......
Before this PP post you even don't know that these 3-packs have existed. You have never used it. The products have no relevance at all for your personal photography. Or for the OP miha, or AgX.
And the same is valid probably for 99.9% of all photrio members here.
Even for me as an Industrial 100 user it is not relevant as I have never used the 3-packs. I have even never seen them on offer at any Japanese shop. Have only seen the 100 rolls factory cardboard boxes (in which all films are delivered) and the single boxes.
The films are not discontinued. Just two three packs. And 24EXP and 36EXP are available.
It is so strange that again so much hot air is pumped in a topic by members who are not affected at all by the topic.
Best regards,
Henning