The SSD models do a good job of hiding any underlying file system issues. With my MPB from 2010 it would hit a limit after a week or 2 of running where the file system would grind to a halt just about and struggle to browse a directory and be slow to sleep/awake.

With the SSD I don't seem to hit this and in any event the restart speed seconds instead of something like 10 minutes in the example above.