It is digital technology specifically where we are seeing accelerating progress, largely because the progress compounds, using one generation's machines to design and produce the next generation's.

Also, most digital technology is developed outside of the government procurement / military industrial complex, so all the problems inherent to those systems do not apply.

If the Singularity is reachable, it doesn't depend on the ability to create aircraft or weapons of any sort, whereas it would be impossible to reach the Singularity without digital technology.