PDCs on the ground would have support from any civilian population in the area like they do now. Since
you don't have to worry about a vacuum or air pressure (gas and biologicals being the exception). Once
created you only need maintenance teams and a small engineering force. PDCs in hostile environments
would be like many smaller ships fortified into the terrain.
To my mind some of this does not really makes sense. Folks complain about 'armor' being mountains
and heck yes that is true, it IS armor. The new system makes perfect sense for ground combat but you still
cannot get me to agree towing a trailer with a 20cm laser into a piece of land and plugging it into a mobile
power source is a fortification. I don't care how much armor you put on that RV its still dead from blast or
concussion. Modern forts consisted of reinforced concrete and steel. They can withstand an amazing
amount of punishment. having 6 'engineer' vehicles to dig pits and make sandbags for towed weapons
is pretty ludicrous when called armor. Nor can you lay armor plate in pieces like Robbie the Robot in Forbidden
Planet.
Again spend about an hour or two online researching forts like the Metz forts vs Patton, the Verdun forts
that even when captured were horrendous to try and take back. Fort Drum is my favorite. It is the perfect
example of a PDC in historical warfare. The Maginot Line... Cheyenne Mountain, which is a fortified command
center.
I don't care what sized engineer vehicle you have its nothing like having reinforced concrete and 9,000 feet
of mountain around you. and for desert all the buildings inside are mounted on giant springs to roll with any
blast short of destruction.
A PDC would be much more like a group of heavily (depending on armor and terrain) armored and armed
spaceships than 'static' weapons. Especially so when you think of all the cables and antennas to connect
all these surface defenses together and how fragile those connections are (look at WW1 and 2 effects of
bombardments), or even you own troops, destroying the surface infrastructure. And burying it 20 feet down
still would not be enough as has been mentioned in report after report.
Also surface launched missiles still should exist but they would have to be 2 stage with the lower stage the
booster for getting out of the atmosphere and the upper stage the actual missiles. The Russians use alot
of mobile missile ICBM,IRBM,Tactical launchers and so do we but we have (or had) alot of fortified underground
missile launchers designed to survive a near miss.
Making the fort piece by piece as suggested would be fun but is alot of micromanagement and that it really
cannot take into effect real terrain and different circumstances on each planet. Just like folks say a PDC is
just a ship on the ground but plugging the same static units in one place is not like having them in another.
I am still learning this all over again and with 1.8 I seem to have less crashes so I am getting further along.
I imagine I will use the included static designs for making 'defenses' on a planet but I know myself they would
be nothing like you would need in 'real' life and would be incredibly fragile. Again, Fort Drum, concrete battleship.
Never taken by force from US in Manila Bay nor knocked out by heavy artillery and bombings. Retaking it back
required US forces to pour a napalm like fluid into it with demo charges and kill the Japanese defenders but the
fort, with some repairs, would have been usable again.
https://www.warhistoryonline.com/instant-articles/fort-drum-the-concrete-battleship.html I will try and make this my last response.