Comment by spacedcowboy

Mac SSDs are expected to last 8-10 years, even with high use. though Apple don't publish these values specifically, it's possible to start to extrapolate from the SMART data when it starts showing errors.

A good SSD ought to be able to cope with ~600TBW. My ~4.5-year-old MBP gives the following:

    smartctl --all /dev/disk0
    ...
    Data Units Read:                    1,134,526,088 [580.8 TB]
    Data Units Written:                 154,244,108 [78.7 TB]
    ...
    Media and Data Integrity Errors:    0
    Error Information Log Entries:      0
    ...

I'm sure an 8GB RAM machine would use more swap than my 16GB one, but probably not much more, given that mine has had heavy use for development and most people don't use their laptops for anything like that. Even so, that would still put it well within the expectation of 8-10 years, and that's for a $600 laptop.