We had a forty foot Norway Spruce about ten feet from the back wall of our previous house. It had started life as an indoor Christmas tree many years before we bought the place. The roots were growing across the lawn and surfacing through the grass, and I started to worry about where else the roots might be going, so we reluctantly took it down. Like others have said, we got far more light into the garden, but it was always full of lovely birds - goldcrests, greenfinches, goldfinches, a visiting sparrowhawk
and even, one bad winter, a waxwing! They never came back, even though there were other trees in the garden. The subject of trees is very emotive, even when they are lining roads and are not in your garden. Here in one of our leafier suburbs, the council decided to cut down some trees in a road where the roots were causing a nuisance. You've no idea what a broohaha it has caused, even though they were going to replace them with less troublesome species. There have been petitions and letters to the paper and a proper war of words. I expect the council were fed up of being sued by people who had fallen over the heaving pavements.