You can already see some relatively high-volume components produced with additive processes, but we still need to address part strength/integrity and process reliability.

In my (admittedly limited) experience and leaving aside cost considerations, process reliability is the biggest thing holding us back from widespread adoption of AM in mass production. If you could just leave the machines running lights out with confidence that you’ll get good parts in the end, then individual process speed wouldn’t be a huge issue. We aren’t there yet, though.

I imagine this is where mass CNC machining processes were ~30 years ago.