I'm glad I'm not the only one who does this! I am jealous of all the new suitcases. Mine are so old- they were a graduation gift from high school, and I'm now 41. My husband just had a cloth duffle bag when we got married, and we've never bought anything else. I really need to upgrade. But now I know what suitcases I will buy when mine are totally dead- they have held up amazingly well.
Anyway, I've been spending my cash on new clothes, new shoes, and packing cubes instead. And of course, it's a wardrobe to match what we're doing each day- haha! I've also been watching videos of Marie Kondo packing bags, so I can practice squeezing it all in!