Sample Libraries ???

Hi
Regarding sample library's and CPU power, if i intend to work with one sample library without running multiple library's and instruments simultaneously in any given project, would it still be recommended to install the library on a seperate SSD? Or would i be good to go with the stock SSD in a MacBook Pro?
The music production I'm involved in consists of solo piano recordings in Logic, therefore its rare I would ever run a second sample library at the same time. Given the above scenario would this justify being able to run the one library on the stock drive without excessive demand on the CPU?
Regarding sample library's and CPU power, if i intend to work with one sample library without running multiple library's and instruments simultaneously in any given project, would it still be recommended to install the library on a seperate SSD? Or would i be good to go with the stock SSD in a MacBook Pro?
The music production I'm involved in consists of solo piano recordings in Logic, therefore its rare I would ever run a second sample library at the same time. Given the above scenario would this justify being able to run the one library on the stock drive without excessive demand on the CPU?