I never understood new Ferrania's intention to make a slide film. Of all film types, transparency must be the one most vulnerable to digital photography. It's impossible to print from directly since the demise of Ciba/Ilfochrome, and harder to scan than colour negative stock, as well being very expensive. Are there still slide clubs? I have no idea but digital projection has captured the group audience.
The few remaining film manufacturers are no secret, so any "new" films are short runs of existing stock repackaged. Technologically speaking, Portra and Pro400H are the peak of millennial film technology and unlikely to be surpassed. When not shooting those I'm happy with Foma level technology for the look and price, and long may their cogs continue to turn.
IIIRC, the Ferrania Kickstarter project began at the time when Kodak had recently discontinued all Ektachrome (and, of course, Kodachrome in 2010) and backers also envisaged that Fuji might also pull out of slide film. The project was to offer 35mm and 120 slide and 8mm and 16mm cine; other films and sizes were hinted at, to follow later.
The world has moved on since, Kodak are, hopefully, re-introducing Ektachrome, Fuji is still in the game, and, as you say, slide shows get more of a rarity, and negative film or B&W is easier to print and scan. Ferrania has become more interested, for the moment, in the B&W route (yes, I do know it should help to iron out faults and possible problems, toward their promised colour coatings), and no doubt the "alpha P30" has a novelty value (anyone actually had any delivered yet? Just asking ? ). But I rather fear that, the longer Ferraniachrome is delayed (and the longer Kodak take to produce the promised Ektachrome), the less demand there could be, other than from a few dedicated users. And, yes, before I'm accused of being as asshole, as happened from a "Ferrania enthusiast" on another thread, I do still use and enjoy (Fuji) slide film myself, so I'm
not knocking
anyone ! And I backed the Kickstarter, at one of the higher Reward levels !