I don't really understand why the original developer felt that
increased firing rate was so superior to the other upgrades as to
justify a far more inflated cost. Frankly, I find this upgrade to
be *inferior* to the power and output upgrades, for two reasons:
one, it doesn't increase the amount of damage inflicted per second
much; two, it increases plasma ammo usage as well, whereas the output
and power upgrades have no effect on plasma ammo usage. If anything,
firing rate upgrades should be *cheaper*, not more expensive!