Earlier quoted context omitted.
I bought it when Sublime Text 2 came out of Beta, which wasn't all that long ago, was it? As somebody that very rarely buys tools, it's hard not to feel a little incensed.
It's $30. What sort of development are you doing that isn't worth $30 for the single tool that allows you to do it? I can't imagine carpenters are incensed when Ryobi brings out a new $300 drill. You either buy the new drill, or you keep the old one. Nobody expects new hardware for free, why software?
In the first case, the value of your goods and of their use to you is more than just one drill.
In the second case, you end up paying more than the price of the newest software, for just the newest software.
From this, one could make the argument that the most fair upgrade price would be $11 - the difference between the old and new software.