I dont get this - you can just print with SMD paste and then reflow the whole thing at once - though you will need high temp materials to do that, but several amateurs have done it.
Afaik there are a lot more high temp UV resins you can print with.
Afaik there are a lot more high temp UV resins you can print with.
Also looked at RF and metal salt processes, but it had more problems/hazardous-material than traditional laser setups.
The core problem is making these machines safe and cheap to use. =3