In a lot of cases you still come out net positive even if you trash the particular service during the latter half of 3 year term. The lesson is more that you s

In a lot of cases you still come out net positive even if you trash the particular service during the latter half of 3 year term. The lesson is more that you should pay attention to when the last reduction occurred for a given service, and the actual discount you're receiving for reservation. Another good consideration is how much of your time it takes to determine cost analysis against the fact that you're probably investigating cost savings in the tune of +/- 5-15% (EDIT: leaving this here, but this number doesn't make a lot of sense) of your total aws charges anyway.