Sure would be a shame if it suddenly died.Well, actually I'm hoping we didn't kill it by cutting a major root that was causing issues for an underground sprinkler line. Probably won't know until next year.
That thing will probably cost me some bucks to get taken out and I can imagine that the getting the stump ground would be a major issue as well given that there are sprinkler lines, deck and lighting all very, very close to it. If I were to proactively take it down (wife would not be too happy), I can imagine it would be part of a larger complete deck replacement, etc project, which would be major $$$
Its for cut stumps, but have heard it can be actively absorbed by roots and also kill trees. I think it was here I was warned to be VERY careful and not use it near trees I wanted to keep.