> We had 3D printers in the 80s, but 3D printers starting becoming a lot cheaper only in the past ~5 years.

Unfortunately, SLA-based printers mostly suck and, unlike most software things, can't actually evolve to get better due to material constraints.

However, now that the SLS patents have expired, we're starting to see useful 3D printers at useful price points. Being able to print a robust plastic (nylon) and not having to worry about creating supports for narrow parts are big deals. Of course, SLS is a little less hobbyist friendly because of the powder handling.