We did not ship often! Quality is more important to me than being able to quickly fling rubbish out of the door. Anyone can do that.
For audio hardware, you don't want to be grabbing software + firmware updates multiple times a week. You might be on tour with the hardware and changing it whilst on the road is likely a no-no.
I am now at a place where we ship daily, sometimes multiple times (different branches). The emphasis on decent code and quality is now higher than the previous place I worked. The codebase here is also incredibly vast by comparison.
We can still add features quickly but it is of little use if it is of poor quality. What's the point of bad software even if it is quickly shipped?