This is why I would NOT buy a Gen4 NVME SSD (yet)

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Is DRAM Cache SSD better? Netac NV7000 m.2 NVMe SSD Review [Creators Edition]

These adapters are made to occupy PCI Express slot(s) on your motherboard, and can be used to power additional SSD storage in the M.2 form factor. PCIe 4.0 NVMe M.2 SSD Adapter, Compliant with PCIE 4.0 X4 64Gbps full speed support. Movable M.2 NVMe stand-off and multiple plated-holes supports type 22110, 2280, 2260 and 2242 SSD.This adapter is only for 'M' key M.2 PCIe SSD, doesn't support SATA connection.