If I were them I'd be ashamed to put my name on anything with such a basic malfunction as a memory leak of that magnitude, that's so '90s programming, especially after not being able to fix it for so many years.
Other way around. In the '90's you had to plug all memory leaks because you only had so much to work with. And you could only crank up an application's memory allotment so far, because the OS needed a cushion of its own.
Now all applications have access to all memory in the whole computer and if something ends up using four times as much RAM as it did at opening, well, there's always more to go around.
My father used to say, in a slightly different context: disk space is cheaper than good programming.
:: quick detour to calculator ::
At $49/MB (the earliest price I remember for SIMMs), my current computer has about $200,000 worth of memory.
Let it pour.
Besides, Firefox 11 gave me an awful scare because when I looked up the list of blocked add-ons I thought they were saying that these were all things they had blocked from my computer. Oops.
Camino had a popup blocker override when Safari had only just introduced the blocker and That Other Browser didn't have one at all and Firefox was just a gleam in the Mozilla project's eye. Hard to change habits. Don't trust Chrome, Opera is loathsome, Safari has its uses butbutbut...