I don’t work there so I can’t speak definitely, but much of it probably stems from the sheer diversity of software. For example, ladder logic typically does not

I don’t work there so I can’t speak definitely, but much of it probably stems from the sheer diversity of software. For example, ladder logic typically does not have the same tools as structured programming but is heavily used in infrastructure. It is also sometimes restricted to specify a framework, leaving contractors to develop in whatever they want.