Think of it this way... how many times does the person actually come up with an update showing the fish in its supposed larger tank?
Not very often...
Very good question, but it would probably take the mods to answer that one. Because ...
By update, do you mean another post at a later date under a new thread, where people who'd previously flamed you can comment on how nice things are in your tank. But never realizing (nor apologizing) that this was the same person who had the same fish in a tank too small ... but had finally made their upgrade?
Or by update, do you mean continuing on the same thread a person had first began inquiring about an issue (usually compatability) before the flaming began on tank space. Thus resulting in more flaming from persons who don't want to read all the pages and see when the upgrade/changes happened?
It's something I've often wondered as I've seen both scenarios played out here on this site.
But it's true most people who say they'll upgrade probably do so to keep the flaming at a minimum. As they really just want an answer to their original question.