In terms of production, using a network results in a shorter BOM which, in turn, results in fewer items to order, stock, or risk being unavailable as these networks combine from three to over twenty resistors in a single IC-like package, like Microhm LSP series. Networks also simplify the actual production process as there are fewer component reels to use, and they speed assembly since a single pick-and-place step is need to put the resistors on the board, rather than multiple steps.
There are two other factors to keep in mind when deciding to use a resistor network: thermal impact and crosstalk. Although the network package may be operating within its dissipation ratings, it does concentrate this dissipation in a small, localized area. If this location is in a thermal “shadow” zone with marginal airflow, some resistor-network thermal derating may be needed.