All Samples should be placed on SSDS because samples are read only and not being written on at various times.  Just put the samples on their once and leave it alone.  This should allow the SSD to last a long time at a very fast rate with super low latency.
 
I am not sure about using one for recording all the time.  I have not caught up on whether the SSD will slow down upon lots of re-writes which occurs on a dedicated audio recording disk.  I suppose others know whether these older hurdles are no longer relevant.