I thought 40G&#x2F;100G ethernet was already optical (and multiplexed, much like PCIe)?<p>EDIT: yep <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;100_Gigabit_Ethernet" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;100_Gigabit_Ethernet</a><p>I&#x27;m pretty sure that the only obstacles against &quot;ethernet as a truly universal bus&quot; are either minor (someone&#x27;s got to invest in making adapter interfaces) or of the &quot;why bother&quot; variety. Unfortunately the latter is a bit of a show stopper as far as I can tell :)