I bought a typewriter this year. I became interested in how they work and did research on what models were considered the best portable manual typewriters in their day. I found one (Smith Corona Silent Super) at a rummage sale just before summer. It was $35. The local typewriter repair shop (yes, there is a local typewriter repair shop around here) estimated $160 to go through it, clean it up and replace the ribbon. The shop had a backlog of job, so they had it for two months. When they were done, they found that my typewriter was in better shape than expected, so the repair cost was closer to $120. And I was able to get 5 ribbons for $10 on eBay.
Two side notes:
1. The plastic-cladding on later Smith Corona typewriters take so long to remove (to reach the guts of the typewriter to do the actual servicing) that it raises the repair costs to the point of making repair uneconomical these days.
2. The most common way that typewriters get damaged is by kids randomly hitting keys and bending the rods and levers inside the typewriters
As far as film ... I worked in a photographic darkroom for years. I have a bunch of B&W film in the bottom of my refrigerator and powder mix for developer and fixer. I taught my oldest kid how to develop film and I will do the same with my younger kids as they get old enough to appreciate it. To me, there is some cool about making pictures with chemicals.
As far as the Max Max future .. I am more concerned about film going away than typewriters (or typewriter ribbon) going away. Ribbons can be re-inked and many typewriter repairs are as simple as straightening a bent rod. Film photography, particularly color photography, require special chemicals that are hard to create without your own chemical factory.