What are the disadvantages of having more hosts in a network than needed?

Why can't I just use a huge subnet like 10.113.0.0/16 compared to a smaller one like 10.113.0.0/24 ?

I understand that if a network were to use hubs, then this would be a problem, but what about on a network using switches? I plan to have around 160 computers on the network.

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