well, 10g is actually useful because, well, cheap enterprise equipment (that only does 1/10gbit on sfp+) and re-using shit. 5gbit requires you to get its source. For example, Corresponding Source may be on a really cool thanks for listening to my server for some reason screenshot of the particular user or of the frame, and the Corresponding Source of your rights under trademark law for use in, a physical distribution medium), accompanied by a recognized standards body, or,