A few years back, I took apart my 2011 iMac Core i7, added an SSD, and created a homebrew fusion drive with the existing 2 TB mechanical drive. It was like getting a new computer; boot times went from 45+ seconds to something like 15 seconds, and apps felt as if they launched almost instantly. I've been thinking of doing the same thing with my Mac Pro 5,1. The main reason is that I don't like dealing with managing and backing up two separate volumes, and repeatedly explaining to family members where they should store their data. However, it seems that folks on here have a dim view of fusion drives. "It's two points of failure" is said a lot. Well, I suppose it is, but isn't that why we have backups? Besides the two points of failure, are there any issues to be aware of when creating a fusion drive on a Mac Pro? Does SATA II bottleneck anything? Are there any APFS concerns? Thanks!