So Donice I hear ya but check out those links.. NASA did it in 1966 and I forget the year of the second link but they gained a 27% life on I believe the cathode? 

What also caught my attention is how the life of the electrodes are predicated on their very construction.. In essence the machining of the ends especially.

Then it talks about combining different alloys such as copper and titanium..

My thoughts on this, separate from cooling with liquid nitrogen is that what if you could take a brand new 1 million dollar 3D printer that could print kick azz long life bimetal electrodes?

No issue with smoothness of the ends when 3D printing..

So I'd be curious with combining liquid nitrogen cooling with state of the art 3D printed copper/titanium electrodes, and selling that extended (27% with Liquid Nitrogen) to companies that may want to spend a bit more so as to have less maintenance on electrode change outs?

That first link is a very interesting read..and let's be honest, if there were to be an impediment, the electrode life and changeout there of MAY be of concern in adopting but I could be COMPLETELY wrong and out of phase with this sentiment.

If Peter is able to, hopefully some light could be shed on this subject.

The liquid nitrogen is no secret but I suspect it could be Pyro looked at the overhead that would associated with this and opted for liquid cooled. 

27% is a lot for electrode life extension though?

I'm repeating myself mmmmeeeow.. lol

Peter may in short suggest too me to lay off the beer bong one hitter..