Going back to the reliability/cost discussion (which I think is a really good one)...
I got curious about the replacement cost of the 10 node boards in GOTLE. The 7 that are available are currently about $1200. If I assume the three Serial LED boards are about $70 each, that takes the cost up to ~$1400. LOTR has 2 boards to implement all of this, at a total cost of $765. This may be kind of academic, since you'd only have to replace all the boards if something catastrophic happened, like a lightning strike.
I agree that connectors get flaky as they age. Old PCBs are surprisingly robust, though. Most of my 80's games are still running their original boards. As long as you avoid battery acid damage and shorting things out, they'll last forever.
I have my fingers crossed for Spike. I love the reduced wiring, and the creative options that it opens up for designers. I hope that diagnosing problems becomes much easier, but I also hope every repair doesn't become "replace the node board".