Yeah, 5x SATA SSDs (240, 256, 3x 480) and also one NVMe 256 as the OS drive.
I did the opposite. 5x NVME and 1x SATA haha. SATA is not worth buying anymore at current prices. 6.5TB of solid state and 8TB of mechanical. Looking for another 8TB drive on the NAS now. Storage needs are rising so quickly.