One of the SSDs died a couple of weeks ago (unexpectedly Linux didn't fail safe properly, it fell over trying to read from the broken one and didn't seem to try read from the other instead, upon coming back up it ran from the good drive OK) and RAID saved my much hassle rebuilding from the previous night's backups.
The SSDs in my desktop box aren't RAIDed, nor in my laptop (two wouldn't fit), but I can easily survive either of those being out of action for a couple of days and may backup regime involving copies on the local file server and on remote hosts (fingers crossed) should mean nothing gets lost if they do die.
I've not found the failer rates of SSDs to be any different to spinning media - I don't trust important data to a single drive of either type.