The most important thing is to keep good gear working, and to spread the love, for the personal and public "art form".
Bringing in new shooters, and helping to encourage a long term commitment to Film, Darkroom, and personal-growth, is IMO, the best way to ensure those companies that put-up and pull-down those multi-million production lines are growing in production, no stagnating in the "too little Profit to bother category.
We also need to think about how to encourage the development of 'small production line' machinery/operations.
I believe that, just as other old industrial production in a number of areas have been accessible and profitable in the use of new machinery and methods, so could film and paper production,
Old films/papers that were/are of high quality/popularity could be kept alive,and keep our art form, yes, photography is an art form, just as watercolour painting is, and has, the similar distinction, that everyday folks, old and new, can work on their own level, and if they excel, will have a demand for their work, even if they never sale a thing, and do so for pleasure or need.
Modern tech is increasingly miniaturized, from the start or in the process, and I personally see the possibilities of home printers in the darkroom, processing no images, but, one day, Photographic emulsions, film and paper, on demand.
Until then, we shoot, bring in new lovers of analog photography and encourage innovation toward small line production, keeping alive Kodak, Ilford, etc, as our generations grow and are replaced with new shooters.
IMO
PS. doing the above, if successful, will also encourge the production of proven kit, and innovation that includes purely analog cameras and lenses.
Already, individual camera builders are working in 3-D printing and CNC construction, building all sorts of analog kit.and I suggest that those that are wanting to know more, simply search for online forums about camera making.