@ Grievous: About missile pods, they still had 12 ammo, but only fired two at a time, for six bursts total. They were weaker racks with more ammo. Later (possibly during 0.6.x), they became four-shot. Recently, Sabot pods were reverted back to the original two-shot burst again due to how AI is incapable of defending against them, while Harpoons retain the four-shot burst.
Four shot Harpoons were deadly with old Missile Specialization 10. Now, I do not know good Harpoons are with modern Modern Spec, but without the skill, Harpoons are far too unreliable (too slow and easily shot down) and low ammo, not to mention AI squanders them at insignificant targets at times.
The only missiles I bother with are Hammers, Reapers, Sabots, Salamanders, Annihilators, and Locusts. Some of those are only good as player-only weapons. Hammers and Reapers are cheap, Sabots are life for high-tech, Annihilators are life for low-tech, Salamanders can be good in one-on-one duels, and Locusts are reliable, effective, and can get enough ammo (with Expanded Missile Racks) to be useful in a long fight (which is every fight late in the game).