Braided polypropylene vs prestretched polyester mainsheet

[NCWindRunner]

Why was my Zuma originally equipped with a braided polypropylene mainsheet? Is it just easier on the hands? Cheaper? "Shock absorption"? Because it floats? I'm looking to make some updates to the boat and am thinking it may be better to go with a more typical type of line.

 

[LaLi]

Polypropylene floats, is cheap and does the job.

Any relatively stiff polyester rope about 7 mm thick is good enough for a recreational singlehander. Doesn't have to be prestretched or anything.

_