Share 'Carrying multiple flavors (plastics) of discs'

I keep seeing that different plastics for different models of disc can perform, well, differently.  Why is this?  And why would I want to carry, as the title says, various flavors (plastics) of each disc?  Why not carry all Star, or ESP, or DX?  If one effect of DX or Pro-D plastic is that it can get beat up easier, thus "making" an anhyzer disc, wouldn't it be advisable to do this?  (Not that yo…