1,829,875 companies with 5-9 employees 779,922 companies with 10-19 employees 467,634 companies with 20 - 49 employees 170,749 companies with 50 - 99 employees
Of that a few are pure software companies, but it’s far more common to want to automate something. Which often means outsourcing it, but then they simply can’t afford these kinds of large projects.
At the other end only 23,553 companies have 1,000+ employees. Yet even at that scale it’s not guaranteed to have large development teams in house, a single hospital can have 1000+ employees and use mostly 3rd party software with a few generalists to stitch everything together.
Starting from the other end, the Stackoverflow survey has 50% of devs identifying as full-stack. Most surveys have Java as the #2 programming language, where it’s been for the last 20 years. That says nothing about how those devs are organized among teams, but I don’t think it points to such arrangements being “rare”.
I always took that kind of a breakdown to mean most website developers where full stack with embedded etc being their own categories. With majority full stack teams including various specialists as needed, which fits my experience over the last 20 years.
However, Android is Java and is frequently used as a front end. As things grow I normally see teams split by system, so I can see mobile being split off as their own team becoming more common even if it’s the still the minority. That said, it’s teams managing the backend teams which would be considering Java vs NodeJS and based on that 55% I think most teams are familiar with JavaScript.
I think you underestimate the number of huge companies that see major benefit from large teams working large development efforts.