I bought a couple 500 GB SSD's when they very first came out - I think they were around $750-$800, but I was feeling saucy and was putting together a brand new i7 computer at the time. Well, both had failed within 6 months.
The above is no longer representative of the quality of SSD builds these days - my issues were from I think around 3 or 4 years ago now.
I would think that you could get way more bang for the buck by buying several 240 or 256 GB SSD drives, and that would give you more choices in splitting files/folders across different drives - seems like this would or at least could, be better for performance. I think there are cheaper prices on using multiple smaller drives, rather than paying for the technology of a single larger drive.
I look at it like as if I was looking at a 4 TB 7,200 SATA III drive, versus a couple of 2 TB 7,200 SATA III drives. Same amount of storage, but I could split data across , which would potentially give me a better performance situation, IF I were to choose wisely which folders were stored on which drive.
Others may well know better than I.
Bob Bone