Color and slide may not last. B&W? Definitely. Kodak or Fuji? Who knows. All I know is 10+ years ago predictions on sites like photo.net were saying film would be really hard to get in 2-3 years and dead and pretty much impossible to get within 5 years and if so would be $15 or more per roll. Again, that was 10 years ago...

I got enough b&w 35, 120 and 4x5 in my freezer for at least 15 years or more...