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Re:High-Tech can’t last: there are limited essential elements by Tade0 on Wednesday June 12, 2019 @07:20AM (#20163438)
There's something better on the horizon:

https://www.sciencealert.com/vintage-vacuum-tube-tech-could-...

Also regular vacuum tubes are still pretty competent for power applications.

Making a switching power supply might be a challenge though - we would have to return to using Thyratrons which contain mercury vapour.

Re:High-Tech can’t last: there are limited essential elements by pjc50 on Wednesday June 12, 2019 @08:18AM (#20163759)
The nanoscale vacuum transistor is still a silicon device - part of the point of it is that it can be produced in a conventional fab!

Power diodes are not going to be a problem, they are a comparatively crude device from the 50s.