[manytimesaway]

Things are much more nuanced than this, at least on SEGA's side.

The Mega Drive derivated from the System 16, but was itself converted into an arcade system.

Titan-Video derivated from the Saturn, according to sources online.

NAOMI/NAOMI 2/Hikaru were derivated from the Dreamcast during development, and there is significant overlap in specs between them and the DC.

Chihiro derivated from the OG Xbox.