I just got another order for an 11 X 14 silver print of one of my 1967 Janis Joplin photos, and I'm out of them. Time to make up another ten. It might take a few years to unload them all but so what! I still get calls from people who want me to shoot someting with traditional B&W film. I'm still printing with enlargers, easels, lenses, trays, etc. that I bought back in the early to mid 1960's, and mostly second hand at that.
I've got some prints hanging at a local gallery. The owner labled them with a price and the words "Silver Print". It means something to a collector. In the meantime my equipment cost is limited to perhaps a couple of bulbs a year, and I still have my negatives and contact sheets neatly filed going back to 1961.
Another way to look at the viability of B&W film, paper, and chemical is not how much has been replaced first with color and now digital, but how much is sold today compared to 1908. Back then there were a lot of companies competing for the business. Some of them must have been relatively small players but they were in business before being bought out by or merging with other companies. I don't think many just went bye-bye. DuPont absorbed Defender before pulling out of the sensitized materials market about 1968 but Ansco and Agfa had some kind of co-operative arrangemsent, Gevaert and Agfa merged. Fuji has taken up a lot of the slack. There are several small paper makers producing premium papers. Lucky in China is still in business and growning.
Consider the current glut of cheaply priced top of the line enlargers, lenses, and accessories as a buying opportunity!