It’s going to happen sooner or later, on every system you own. You’re going to want to download something, or install something, or save a game, and you’re going to discover you’re out of storage space. So you’ll have to wade into the data management option in search of stuff to delete. And you’ll discover things you’d long since forgotten.
For instance, to make room to download a Wii Ware title, today I discovered that I played Manhunt 2 on the Wii. I did? There even was a Manhunt 2? And it was on the Wii? Also I apparently played something on the Wii called Boogie. I’d rather you didn’t let that get around.