Starbases are horribly overrated.
They have bad hull/pr they have worse weapon/pr, their modifiers are typically average for their races, and their damage is often spread over three weapon categories. For a ships that take so long to research, and are only defensive, they are the worst "defensive" ship designed for defense in the game). Plus their range is not that great, they usually are out ranged by the ships that they are actually weak to.
Even the lovely A.Miner ships, with 10 range, that are weak to missiles. God the old days were fun, oh look a miner spam missiles "yay I won, because your ships are bad, and your starbases are weak to missiles. Of course you Lakko`s fired first but they used up all their PR on that 13 range so they did no actual damage.
Maru and collective have probably the best two sets of race ships in the game. Virals don`t count because they have 2 good ships, 1 amazing ship, and the best of Maru, Terran and A. Miner.
They make money on food, which given the tax virals and miners gives them good money generation.
The biggest down side is if you do not play consistently, they are arguably harder, since you will never have good planets, and your home world will never be good, because if it was you would be killed completely.
That being said they have their places in some stacks.