I dreamed of diskless, got 6 2TB SSD in SATA form factor. They run hot. I wound up with a noctua fan for the disks, the zimablade is fanless passive cooling. And now with an ATX psu and a mini pc case I have a power supply fan, and got a 6 disk chassis which has very quiet fans built in. But it is quiet at least.
Probably depends on type of ssd. They shouldn’t really run hot
I went with a bunch of second hand enterprise ones (also sata) and seems to be working out great