3D printing said it will change the world in 2011. Then it said it will revolutionize manufacturing in 2015. Its 2020 and it didn't happen. Injection molding is not going anywhere. SLA litho has nicer quality parts but take exceedingly long to print and more importantly - clean/UV bake takes a long time to cure.
One area where 3D printing is actually useful is to be able to print parts that would be impossible to manufacture using injection molding - that cost to benefit ratio must be evaluated and questioned - do we really need a part like this? Perhaps its a dental implant, etc. Then it's justified.
Aren't there parts that exist that are easier to 3D print, due to overlapping elements or internal geometry which require additional manufacturing steps when using injection molds?
Alternatively, its possible to just use Aluminium molds for upto 10k parts.
1000 per month won't really do much. It's a start is all.
Also, i doubt 1 million is a realistic figure. I don't think things will get that bad.
Perhaps we'll stop it. Then we won't need them. Perhaps we won't. Then we will. I'd rather have them than play dice with a million lives.
The million number already has a discount over the worst-case, by the way. Worst-case, all 330 million people catch this, 5% end up critical, and we need >15 million.
And yes, we would need to train up people to run them. It'd be a real mess.
The numbers are not pretty, however you run them.