Thunderbolt 3 -> Thunderbolt 2 -> Firewire 800 -> Firewire 400
                                 -> Ethernet
                   USB 3 -> USB 2/1 --> micro/mini/whatever-USB
  VGA, DVI-D, DVI-I, HDMI, microHDMI, [m]DisplayPort

all there. And after this post, I'll keep them even longer.

Often people don't realize there is only "downwards-compatibility", meaning later technologies can "tunnel" an "older" signal (such as DisplayPort being able to Tunnel DVI/HDMI) when using passive adapters, while the other way it's not possible.