It's not so much new gear for me, but I'm looking for anything which maximises M.2 slots. I have never bothered to have or build a NAS before now, but the power available at this point is pretty amazing, so going all-flash seems key for me. I used to track how filesystems were going with tiered storage, as I planned slow spinning rust tier and a modest amount of SSD for fast tier. But these days I just don't see the need for HDDs in there, so tiered storage no longer seems necessary.
I do like the idea of the Jonsbo N5 with water cooling though 🙂