It's an older (2008) model macbook - better for me to spend about AU$300-400 to go 2x300ishGB RAID 0 to get a boost in speed and extend the life of the laptop for another 2-4 years than it is to buy the next gen XPS 15 (not going to a new MBP).
Obvs there is a spinning backup I hookup regularly.
Waist of AU$. One single SSD will be plenty
You ll invest in SSD raid0 only to find out that your aging CPU bottlenecks your marginal gains. Or something.
why do you want RAID o on SSDs? there is no real advantage only danger of fail and data loss, also spendy