

Apart from security and upgrades, there might arise situations where you want to change aspects of the underlying operating system, and these changes might require changes to the source code.
Also if you remember Stuxnet, those computers were also airgapped not connected to the internet.
Most of these titles don’t have mainstream appeal though. The example is true for the majority of players.
I do love me some indie games (probably 95% of what I play atm are Noita and Balatro) but I’ll admit it was really cool as a child / teenager / young adult to see the improvements over time.