vintage1950
A sycamore in that isolated position is doing no harm to anybody. A sycamore in a small suburban garden is bad news. I think you are looking at this tree from the point of view of someone with a small garden with buildings close by. It isn't sentimentality - that tree was a beautiful thing.
I was looking at it from the point of view of someone who has far more trees than people who have 'suburban gardens with buildings close by. We have oak, ash, alder, birch, sycamore, hazel, wild cherry, maple, hawthorn etc. I love trees, too.
What I am objecting to is the belief that the offspring of one tree should be extensively perpetrated for purely sentimental reasons.