Flow paradigm doesn’t claim scale though. It’s about being a DSL for specific environments, often visually-oriented software like CAD or interactive art, which doesn’t have heavy 10K person team requirements.
For example, Programming a security system for my house would be great visually. Programming all of the houses on my block? Not so much. Even though the textual rules would be roughly equivalent.
If you are programming a singular thing, this probably has good legs. As soon as you are programming many things, though?
This is why cad systems can be seen as visual programming of parts, but are never considered for this debate.