sanguy :
1. have you ever tried to get your X# of TB off a failing HDD? That is nightmare if you are not using RAID
Nope. I have backups.
sanguy :
3. Regardless of either SSD or HDD, I prefer to store my important data on raid protected systems. Huge SATA drives take days to rebuild especially with low end raid cards. With SSD rebuild time is much lower meaning your exposure to risk is much lower.
I have backups of my important data. Backups minimize risk exposure no matter what.
sanguy :
4. SSD if you have concerns about the drive just evacuating the data is much quicker.
I have backups, I never need to evacuate data.
Now seriously, independently of SSD/HD, and RAID/noRAID you should ALWAYS have (multiple) backups of your important data.
No RAID will protect you if your brother/girlfriend/son/wife/motherinlaw accidentally/intentionally erases the system file, or from your PC catching fire or falling out of the window. Most data loses are caused by human intervention, and RAID does not help there.
At work, where i really have important data, I have everything on SSD in my local PC, I regularly make backups from SSD to HD (in same PC). Periodically (specially when I have new important data) I backup everiting to my corporate storage system (wich is highly redundant and located in a different building) and my company makes backup of its storage sysem on tape (tape is stored in a different building).