"Crunching data coded using photons — photonic computing — is one example, and in 2007 researchers built the first workable optical transistor. But now the idea of computing using heat flow is gaining popularity among applied physicists. Heat travels through solid materials by means of phonons — ripples of vibration passing through a series of atoms. Those ripples can be used to send and store data in digital form: one temperature is read as 0 or 'off' while a second, higher temperature is interpreted as 1 or 'on.' Provided that the thermal memory is well insulated, it can keep its temperature — and data — intact for a long time." From: https://hardware.slashdot.org/story/09/01/30/1827214/pcs-waste-heat-could-add-to-processing-power
Then there's this from over 12 years ago by Kamachi (taken from Index SS2): https://twitter.com/Pablusky27/status/1299082189116710912?s=20 and https://twitter.com/js_06/status/1299173604609978369
Having read this, I'm still curious, hoping for more explanations, but I won't get my hopes up too high. The arc is still ain't over after all.
Also, if Railgun does continue beyond this arc, I hope we go into NT stuff.
The stuff Misaki said about Aleister Crowley in NT18 could be something they could expand on, so maybe something along the lines of that would be nice.