I bought a 4 TB 990 Pro for $250 a few months ago, but before I got around to installing it, on another PC, had an OS update error that wiped out my old SSD (which I used for both boot and data), so now am thinking I want to have separate boot and data drives so I won't loose my data again in the event of an error with the boot drive. But I don't really want a boot drive that is slower than my data drive (the 4 TB 990 Pro). What do I do? Spend $100 on a 1 TB 990 Pro or $85 for the 990 EVO Plus or WD SN850X and have a slower boot drive than data drive? 18% more is quite a premium for the 990 Pro. My old boot drive is a slow SN550 that I'll re-purpose into an enclosure for a DVR.