HY - please do not create urban legends about SSD to scare people away from them ;D
Let me clarify some things... ;]
It's not like SSD has finite number of reads - it only has finite number of writes. You can read from it infinite number of times without any degradation of the drive. So, let's say, after those five or more years of using it there will be no possible to write anything on some of its cells, but still those cells will be possible to read - in other words it will become a read-only medium over time ;]
To prolong the life of current SSDs, companies install some additional unused cells in them, and in case of any basic cells degradation these will be replaced by those unused ones. Besides in normal use shear amount of activities on drives are reads and not writes - you usually install system, game, program once and later these are usually read from the drive and loaded into memory. Thus some additional system optimizations are recommended in case of SSD - like moving swap file to other drive or even delete it if your system has a lot of memory, turn off indexing files service under windows, move system folder locations for temporary files to conventional drive, etc.
And as for that "self defragmenting" thing I can only say that any defrag- word should never be used in case of SSD - ever ;D
Defragmentation can improve things a bit on conventional HDD drive, but its completely pointless for SSD, and even degrades SSD by unnecessary writes.
The word you seek here is TRIM function ;]
Without TRIM command the SSD needs to empty the content of previously written cell (even while such a cell is no longer used) each time when it needs to write something there and only after that it can write data to it. And TRIM command just empties such unused cells in background and in advance before they will be overwritten, so it speeds up the write process by various amounts (10% or sometimes even much more).
Well, anyway, with or without TRIM command, in RAID config or else, SSD is always an improvement in speed over traditional HDD.
Even while it is supposed to degrade its write capability over time - such period is still so long for casual user (many years - at least 5, 10, more?) that the whole system spec may change once or twice during this time until any replacement will be needed for such SDD ;]
And those who install their systems on SDD never want to turn back to HDD anymore ;]