I'd obviously disagree that my comments weren't thought through. They are factual and logical, based on many years of using the system almost every day.
Anyone who has a different view of the facts could present a counter-argument, but really, no one has.
people can lose their local copies from device/hard drive failure, or lost cellphones
Yes, this is true. But as I pointed out, Twitpic is not and never has been a storage service, and it does not keep original photos. The business was set up to post pics to Twitter, not to cater for the very small number of people who might have suffered in this way.
That said, all those photos are STILL AVAILABLE ON TWITPIC and can easily be saved from its pages. A simple browser extension would even download several of them at a time.
The only counter argument, as far as I can see, is that Twitpic should have been set up to provide a different type of service, perhaps called Storepic or whatever. But it wasn't. No amount of downvoting hides the fact that some people are simply failing to understand this simple truth.