I think the answer is that they are making Nixie tubes: https://www.daliborfarny.com/project/custom-nixie-tube-for-keysight-technologies/ https://www.daliborfa

I think the answer is that they are making Nixie tubes: https://www.daliborfarny.com/project/custom-nixie-tube-for-keysight-technologies/ https://www.daliborfarny.com/project/custom-nixie-tube-for-k... https://www.youtube.com/watch?v=1nHkhJ52iA4 https://www.youtube.com/watch?v=1nHkhJ52iA4 Obvious choice would not be VFDs or nixies but plain LEDs I'd imagine.