Here is the definitive from Fujifilm UK - I spoke to my contact there, who buys and deals with all Film products, for a good half an hour this morning.
No threat to:
Velvia 50 35mm
Velvia 50 120
Velvia 100 35mm
Velvia 100 120
Velvia 100 4x5"
Provia 100F 35mm
Provia 100F 120
Provia 100F 4x5"
Provia 100F 10x8"
Already Gone, but some stocks still available:
Velvia 100F 35mm / 120 / 4x5"
Velvia 50 5x4"
Under Threat:
Provia 400X 35mm
Provia 400X 120
Furthermore, Fujifilm Japan continue to supply the German marketing company with rights to the Agfa Photo name, with the Agfa Precisa and there are no threats to this at this time, currently selling very well and we have a consignment due soon.
The Flickr page referred to at the head of this thread is someone quoting the demise of 100F and Velvia 50 5x4", which happened last year!
It should also be remembered that Fuji continue to market their superb instax range of cameras and films which offer a very reliable and economical alternative to the polaroid.
There have been, on more than one occasion, statements made at presidential level in Fujifilm about commitment to traditional photography, and this is quite significant, so, even if we see range diminish, I do believe that commitment will continue. But to be honest, the only reason there were 3 types of Velvia was an accident of history anyway (they killed Velvia 50 and replaced it with 100. Then they reintroduced 50, but kept the 100, so we had 50, 100 and 100F)
One final, interesting fact, is that Photography (digital and traditional, and photofinishing, paper) now accounts for only something like 15-20% of Fuji's worldwide business. They are involved in all kinds of other things, like anti-aging face cream for example!
https://www.astalift.co.uk/home - this is a Fujifilm product, and supplied by Fujifilm in Bedford for the UK
see here:
https://www.astalift.co.uk/our-company
Hope this helps.