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by eemil 457 days ago
I'm surprised Chris left out a big reason: cable is cheap, and labor is expensive. And there are a lot of fixed costs that don't depend on the number of cables or their thickness.

You might save a little bit going with 4 pairs instead of 24. But that goes out the window as soon as you need to run a single new cable. If you want to be stingy, pull the cables but leave them unterminated.