Welcome to the family! My Weber turned 14 years old this month. Make sure that you register your grill with them (just makes things easier if you ever need service or want to buy accessories) and sign up on their website for the "Recipe of the Week" email. This is a pic out of one of my Weber cookbooks, Happy grilling!
14 years? That's a lot of mileage. I've got a 22.5 kettle that is on year #2. I hope I get that much run out of it, but I doubt it. Have you had to replace the grates yet?
As long as you keep the kettle out of the elements, it will last as long as you see fit. Its a very simple grill to keep clean and rust/mildew free. I've got a Weber Genesis Silver B that I bought back in 2002 and it still cooks like a champ....I degrease it once a year, flip the grates annually, and keep it covered. If you bought porcelain coated CI grates, there should be no need to replace them.