One thing I am wary about is what the lifespan of any newly build plant would be that uses modern technology.
If you take a random 8bit home computer from 1983, all the non-mechanical parts on it likely still work today.
If you take a random computer from 1993, well most bits probably work.
If you take a random computer from 2003, if you are lucky some things work.
2013? Odds are it won't work.
The differences in manufacturing between everyday consumer electronics and high reliability electronics has grown larger and larger, for two reasons.
One is progress of Moore's law, smaller feature sizes have made electronics more susceptible to many different types of failure[1][2].
The second is RoHS[3], removing lead from solder has basically given all consumer electronics a 10 year life span.
Now of course you can get non-RoHS components, but they are not the norm, and to make things reliable you need to ensure everything is not RoHS.
Want a reliable storage medium? That is going to cost an insane multiple. Want a reliable computer? Another insane multiple, you are going to need to have something built on an ancient manufacturing process, and because you aren't getting the benefits of economies of scale you are paying more, and you are basically getting a bespoke machine so you now need to test it to heck and back to ensure reliability.
One problem with how we have chosen to advance our electronics industry is that the types of goods that are made en-masse have steadily separated from what types of goods need to be made for long term engineering projects.
An example of this in action: when Tesla first came out they realized existing automotive infotainment systems basically sucked and that they couldn't provide a good UX with anything available off the shelf at the time, so they instead plopped new consumer non-automotive gear. A touch screen that didn't suck! But it also melted. Everyone yelled at them "should have known better!" but their choices were "unreliable consumer" or "crappy behind the scenes".
Another example, RoHS doesn't have exclusions for home appliances. RoHS is also why the control board on washing machines gives out after ~10 years, necessitating purchasing a new washing machine even though the mechanics may have another decade left in them! (RoHS needs a crap ton more exclusions for long lived appliances...)
[1] https://en.wikipedia.org/wiki/Reliability_(semiconductor)#Fa... [2] https://en.wikipedia.org/wiki/Electromigration [3] https://en.wikipedia.org/wiki/Restriction_of_Hazardous_Subst...