[Zeke]

I've seen them in SoCal and if they aren't maintained in their own right, finer leaves get stuck and then decompose blocking the gutter. But we don't have weekly storms to blow the leaves off, so it's likely a local problem. My point is only that if you have some kind of tree with real fine leaves and debris, you might still need to clean them.

Nothing's perfect when it comes to gutters, IMO.