I started thinking outside the box about purchasing a new iMac. If a fellow bought an iMac with an internal hard drive, could one connect a MacGurus https://www.macgurus.com/Item/T3-QuadX T3-QuadX ThunderBolt Enclosure with 2 SSDs in RAID0 to boot from? Use the internal drive as a bootable backup. Are the iMac installed Apple SSDs really faster?

I've heard it said that "Idle minds are the devil's play ground". However over active minds might think too much.