The idea that film will become completely unavailable from the traditional manufacturers, in the future, is a distinct possibility. But would film cease to be available from other manufacturers? If there is one soul out there who wants to buy film there will be another ready to supply it. There could be price, variety and quality issues to be sure but it could be argued there are these issues now.
The film coating machine is one answer.
Personally, I want to stay with film. But, I'll switch if the day comes.
I have all film gear, collected over the years, still perfectly good, still perfectly useable. I am a complete amateur, now, and will never use the equipment professionally again.
I am pleased and amazed by the absolute utility of digital equipment. Many would say that it has, or will soon surpass film in every respect. Why would I argue?
But, I cannot, as an amateur, justify switching to a digital system while there is still film available. My M2 will never be replaced by the M8 or other digital Ms in the future. My F2 is a far superior camera (in my eyes) to the D3.
I don't think I am the only one who feels this way. The world is plumb full of us Luddites.
Someone, somewhere, somehow will be supplying film. And if not, well,..... I'll just embrace the alternative.