Benefit of a 15mm vs 30mm still?

[Asos21]

So my current still is 50 litres and is fitted with 15mm fittings all over. The still condenser tuning is 15mm.

I was considering upgrading the whole thing to 30mm pipe all over including the condenser.

What benefit does having a 30mm output have rather than a 15mm

Just trying to weigh up all the pros and cons.