I have never heard of theoretical work but I have heard of shipping every day. I don’t know how often you think is often. But in other places I know people are shipping every day.

It’s not ideal to ship often IMO. How could someone ship something substantial in one day? I work on projects that generate the company additional revenue and if those projects took one day to complete they would fire me because they would really only need a software engineer for four days of the year.

It’s a vanity metric.