

Yes, that’s the only reason. You can mix drive sizes and still have a dedicated parity drive to rebuild from in case things go poorly. I am aware that it’s basically LVM with extra steps, but for a NAS I just want it to be as appliance-like as possible.
Still using Scale at work, though - that use case is different.
Unless the requirements have changed, you’re looking at 2016-2017 era. Intel 7000-series, AMD Ryzen 1000-series. Newer may be available if there’s no TPM installed.