what companies as of now are currently selling cheaper 35mm SLR's and rangefinders, and why have the bigger brands stopped making them almost entirely?
None that I know of. I think Canon & Nikon still have one body each in production, but I wouldn't exactly call them cheap.
Why did they stop? I can only assume it's because the market isn't there anymore. Of course, people will still want them - but not enough people to make it profitably for them.
Companies don't stay in business long if they don't stay profitable... That's just the way it is.
I think current designs are just now starting to move away from the way it way with film too... IS/VR for example - people are always asking why Canon & Nikon have it in the lens instead of the body like Sony. Film is why.
Canon & Nikon had IS/VR before there was a such thing as digital cameras. You can't just move a single frame of film around to do it in body...
I still pretty much only shoot film. I probably will be for a while too.
I don't think it will go away for a very long time. Sure, the selection will get smaller and more expensive though, and that's already happening.
My favorite films keep getting discontinued. Fuji cut a bunch from it's line in the last couple years. Kodak is cutting them too.
What pisses me off though, is that it's only the pro films getting cut. They don't seem to be touching the cheap drug store ones. I think the future is - you will only have one 'pro' film to pick from per brand. Maybe two - a 400 speed and an 800 speed.
I can walk into any drug store and get a 3 pack of Kodak Gold, but try finding a roll of Portra 160NC...
I think I'm going to be shooting a lot more B&W soon since it's getting harder to find my favorite color films. Even ordering on-line there isn't much to choose from. I used to use Fuji Pro 160S almost exclusively, and now I can't even find it.
B&H used to sell it in 100' bulk rolls, now they don't even have a single 36 exposure roll.
I just ordered 100 feet of Arista Premium 100 (which is Kodak Plus-X, from what I've read) and a few rolls of Fuji Neopan SS 100 from Freestyle (should be in tomorrow). There's still a pretty wide selection of B&W films, and they last (a lot) longer anyway - so I think I'm going to start stocking up and hoarding.
So... The future is - fewer, more expensive choices. It will still be around for a long time though.