We had separate rooms when we turned 60. 10 years ago. The snoring, figiting, differences about ventilation were really affecting me. I redecorated our spare room and bought a new bed. It was a joint decision, but it was helped somewhat because DPs gout kept him awake and I was afraid to move in case I touched his foot.
Far from being the end, we both woke up feeling more refreshed. I used to really resent the fact that I would be kept awake for hours by his snoring, but would get a sharp dig, if I snored.
In the last few years, I have become a terrible sleeper. I now have an electric blanket, a kettle and an IPad to keep me company without disturbing him.