Its reasonable if the only games affected were the ones that weren't popular enough for the connection Its sad to see the services be gone for good for all last gen. Just wish they could have adapted their service to run cheaply, or more closed so that they could afford to keep less-used services indefinitely. At the rate the server activity has deteriorated, it'd probably only take a few less of the servers they use, and all they'd have to pay would be the electricity cost. Maybe I'm ignorant on the subject of Nintendo WFC, but it can't/shouldn't cost more than a few thousand dollars to support NDS/Wii for the entire world each year. An expense thats well worth spending to maintain customer satisfaction. And as I was writing that last sentence its more accurate to say hacker satisfaction.... yeah... shut the fucker down.
Though in my opinion, the reason I think these services are neglected because friend codes were/are a frustrating, un-user friendly pain, and the service itself is unreliable. One of my top bookmarks in the past was the page you used to look up error codes.