For the "bunch of NVMe slots", the OWC PCIe NVMe adapters look interesting: * https://eshop.macsales.com/shop/ssd/owc-accelsior-4m2 https://eshop.macsales.com/

For the "bunch of NVMe slots", the OWC PCIe NVMe adapters look interesting: * https://eshop.macsales.com/shop/ssd/owc-accelsior-4m2 https://eshop.macsales.com/shop/ssd/owc-accelsior-4m2 (4x NVMe drives) * https://eshop.macsales.com/shop/ssd/owc-accelsior-8m2 https://eshop.macsales.com/shop/ssd/owc-accelsior-8m2 (8x NVMe drives) I'd personally get them without drives included, as the OWC drives seem pretty expensive.