"otherwise a decent fleet of bombers could completely cripple a production or culture city "
Well, that is exactly what they are for.
Except the missing feature is the land invasion force. You could completely ignore any ground forces and pester your enemy from an aircraft carrier, crippling them significantly.
It's true that if you have loads of bombers, why not just take the city, but that makes the ability to bomb buildings fairly moot anyway.
Get 3 SB's with logistics. Pummel a city and take it in one turn with a tank. Wash, rinse, repeat. Raze as needed. Total Annihilation complete.
Get 3 SB's with logistics. Pummel a city and take it in one turn with a tank. Wash, rinse, repeat. Raze as needed. Total Annihilation complete.
you can infinite stack air units
For me, when CiIV did away with Fatal Bombardment, along with the ability to destroy tile improvements, it took the fun right out of Air Units, as well as much of the fun of Artillery and ships. I'm not a stickler for historical accuracy in Civ but, for Goodness' sake, the purpose of bombardment is to blow stuff up. Incoming ordnance does not pause and think "Oops! That's a road so I won't detonate." It just goes "Boom!" If the idea is to keep bombardment from being overpowered then nerf the damage.
This is neither ahistorical nor bad gameplay. The primary use of strategic bombers historically was to devastate the opposing war effort, NOT to bomb troops (though that's effective too).
What's the problem?
This is true, but you also have to keep in mind that CiV massively massively under-represents the effect of the industrial revolution (necessarily, for balance). In history, this is the effect that counterbalances the effects of bombing. Accurately representing the economic side of bombing presents far-reaching problems.
To a lesser extent, the fact that units repair without any economic cost contributes to the problem as well.
you can infinite stack air units
You would need 1/4 infinite aluminum.
This is true, but you also have to keep in mind that CiV massively massively under-represents the effect of the industrial revolution (necessarily, for balance). In history, this is the effect that counterbalances the effects of bombing. Accurately representing the economic side of bombing presents far-reaching problems.
To a lesser extent, the fact that units repair without any economic cost contributes to the problem as well.
I'm not sure what you mean by counterbalance. World War 2 hit Europe so hard that it took massive overseas capital investments to recover from the devastation, and that it catapulted the United States from a reasonably powerful nation (a status it had achieved in the wake of WW1) to a superpower simply because the United States had not been bombed out. This was achieved largely due to strategic bombing.
If anything, industrialization exacerbates the impact of strategic bombing by creating strategic targets. In a feudal/medieval economy, production of things like bows is decentralized; you can target an individual bowyer but the impact will be minimal. In an industrial economy, tanks are produced at gigantic factory facilities. Bomb that factory and production will be massively set back.