There's eMMC and SATA, even NVMe via PCI bus (with addons) as well as sd cards (hell even boot from usb now too). You can also reduce your write wear with putt

There's eMMC and SATA, even NVMe via PCI bus (with addons) as well as sd cards (hell even boot from usb now too). You can also reduce your write wear with putting stuff like temporal logs in ram etc.