Hi Rick,
Your plant is a Dracaena marginata... and yes they do last a long time! My mother's has been around for at least 35 of my 42 years, and has now reaching the roof of her 12' high ceilings! Here it is in our database... beware this is the plant in its outdoor environment so it will look a lot different when you see it on our database. http://www.easybloom.com/plantlibrary/plant/madagascar-dragon-tree
Thanks Rick!
Best!~ Ian