Squirrel and Deer in particular can trash all your tulips.
Unless the Swamp MW was planted in a fairly wet area, it likely perished from lack of water. Cardinal Flower always disappears on me too/
Lilac grows mainly from underground runners - so you have to dig ALL of them up to get rid of Lilac. But why would you? OIC - someone who dislikes the smell of Lilac. Heh
Surprised about the Daffodils. They are usually there forever. Old homesteads often have 2 things growing - peony and daffodils.