Is it neccessary to upgrade all parts to alumunium / titanium (hop-ups)

[kaskus]

Guys, is it neccessary to hop-ups all the parts (HPI RS4-MT) to alumunium.

I know it will be so expensive.
So let me know which part should i change first, second, ...

[Mason Copeland]

Absolutely not with very very few exceptions!! Why would you think so?!?

[nmtr13]

This isnt a MUST but I think the shocks should be upgraded. Thats what im gonna do.