Nobody lives in Hokkaido. It's one of those places in Japan where having a car is a really good idea, especially when you add the brutal winter. Doesn't matter how well your life is structured, having 2-4 sucks for regular travel once you miss it. It makes the bus service in rural areas here look like a first world problem.
Admittedly, I hope the milk industry never dies. Royce' chocolate and melon milk are love.
There will always be people who will want their train, but JR Hokkaido is bleeding faster than anyone could possibly inject blood into it.