system
Given the following post, respond as if you're commenting on Reddit:
human
Would it be more practical to assemble mega-spaceships in orbit?

I'm referring to spaceships of a caliber we're not even close to building right now. Large "super-ships" capable of being carriers or transport shuttles. Something that big seems like it'd be near-impossible to launch from Earth. But would it be possible for, one day, humans to send the pieces individually into orbit to assemble? It seems it'd be easier to do that there and easier to move forward afterwards.

*EDIT: Thanks for all the responses. Great read.
gpt
The "super-ship" we're technologically most able to build would be an Orion drive. 

There are some obvious arguments against building such ships, but they are more efficient the larger they are and we could make 8 million tons of steel (80 aircraft carriers) fly all at once. Just saying. Pity about the fallout though; maybe when we have cleaner nukes and more relaxed international treaties about willy-nilly use of hundreds of bombs just to make a ship fly.