I learned CAD last year for work and my prototype turnaround times went from weeks to days to same day. Truly game changing for me. I can iterate an idea 5 times faster at least, not to mention hundreds of times cheaper (in some cases $800 part down to ~$5 part)

Even faster would be better, but print speed often isn't the bottleneck, solving engineering problems often is.

That said, of course faster would be better.