Kostya, the advice here has been aimed at trying to solve the camera/photography problem that you are feeling that you have. What I am going to say isn’t flippant or dismissive. You don’t have a camera problem, you have a commuting problem. The most precious thing we have is time; life’s too short to spend throw away even a week of it commuting 4 hours a day. The fact that others do it is irrelevant. No one has to do that, it’s a prison of their own making. There is never only one job one can work at, there is never only one place one can work, there is never only one place one can live. It’s not the Soviet system any more for you. People get tunnel vision and convince themselves that they have fewer choices than the multitude of choices they really have, that everyone has. People convince themselves, or let others convince them, that they have no better options, but that is never true for anyone, not in the long run. No one. People not confined to prisons often make their own, then justify it to themselves.
I enjoy your contributions here, but I don’t hope you get a different camera, nor do I think that a higher ISO capability is going to answer any problem you have. A daily four hour commute is a life destroyer, for real; shooting more digital and less film is an answer to nothing, because the minor camera hardware changes you are considering will prove to be both meaningless and ultimately unhelpful in the face of the overall situation.
Best of luck, sincerely.