@ StrayKAT,
honestly, SSDs are so easy to use as OS drives now you don't really see people having issues with them anymore. You're the first I've seen say they're a hassle to use since before the controllers got consistently good on them.
The bottom line is, whether you're looking for storage or not, drive performance is why people use Smart Response, so that was the topic we were discussing, and a 500+Mb/s boot drive SSD is about the best way to speed up OS and program response time.
That isn't to say storage space at a decent price isn't a good option too, they're just different subjects. That said, I DO feel $215 for a 6TB HDD that performs as well as the WD Black is quite a good deal. That's less than $36 a TB.