In the last few years, build-your-own storage got annoying. Most server disks were SATA, mostly the same form factory and SATA ports are available in abundance. You could get various more complex SFF-xyzw connectors, but the adapters were straightforwardly available.

Now there’s NVMe and there are quite a few form factors. And NVMe is generally a point-to-point link to the CPU, so you either need a motherboard with the right number and types of connectors or you need a PCIe/NVMe splitter or switch. And the latter don’t seem widely available on the non-sketchy-hardware market.

So the situation is fine for system integrators who make their own PCBs, but not amazing for DIY builders.