Hard not to agree here. It's one thing if you're architecting your side project to handle millions of requests from the outset but I think designing for 30,000

Hard not to agree here. It's one thing if you're architecting your side project to handle millions of requests from the outset but I think designing for 30,000 notes will give you a better design at 30 notes too. One example where this approach obviously wasn't taken was early Android builds (at least on the HTC Hero). I emailed support because it started to take 15+ seconds for a sent/received message to appear in the message list and the support engineer said it was because the whole list had to be raised into memory, the message appended, and then the list written out. I've never seen a single iPhone with that problem, so I assume they thought of it from the start.