Barring any other physical failures, you are unlikely see the end of your SSD due to the end of a write cycle before you decide to buy the next one for higher speeds or capacity.

The beauty of SSDs is that they actually tell you when its life is ending, and you won't lose the data on it when it runs out of write cycles either. All the data just becomes read-only at that point...

So do it....MMOs won't be the same when you place them on SSDs...