Our first house had no access to pump the septic tank, so we never pumped it in the 11 years we lived there. The previous owners had purchased the house in 1941 and I'm certain they hadn't pumped it either. Not sure when the septic was actually installed (house was 3500sqft built in 1886).
We never experienced any issues, but it was always a bit of a worry for me in the back of my mind. (What if this system fails, especially during the winter when we get 12feet of snow?!) We are a fairly environmentally-conscious family so I think that helped because we just didn't happen to do any of the things that would cause a potential problem.
Yes, I think most of the issues people have are from the different behaviors families tend to have now vs in the past. These things are all problematic for septic systems, but the majority of people today find these normal activities: dumping food in the garbage disposal/toilet, flushing feminine products or wipes, paper that doesn't break down, heavy-duty or antibacterial cleaners, and simply using too much water (daily laundry, long or multiple daily showers, etc).