You are assuming that you have to mail off your film to get processed. Part of the learning process, at least when an instructor is involved, should be teaching how to process your own (black-and-white) film. It's a foundational thing - if you get to understand not only how to capture an image from a compositional standpoint, but also how the image is produced and how to control how that image is rendered in the final print, you will be in a much better position to execute your vision whether you do it digitally or analog. When you process your own, you can have that feedback in as little as 30 minutes. If you learn how to develop color film (which really isn't any more complicated than black-and-white, just trickier in regards to maintaining proper temperature), you can have the same 30-minute feedback. Or, at least in most metropolitan areas, there's still a good lab around, and still a reasonable supply of 1-hour minilabs (no guarantees on the quality of their work).
Originally Posted by Brian Puccio