One thing I've always thought about the three-year reserved instance is what happens if AWS lowers the price on the configuration, you've already lock in on the

One thing I've always thought about the three-year reserved instance is what happens if AWS lowers the price on the configuration, you've already lock in on the higher price. Three years is a lot of time, technology advances quickly and prices decrease, but if you lock in on the three-year contract, you won't see the benefits of lower costs. Actually, now that I write this, maybe this is how Amazon justifies the lower price for longer contracts.