There is also an element of each project optimizing to its own minimum. If each project selects the best language, tech stack, hosting stack, etc, for itself, i

There is also an element of each project optimizing to its own minimum. If each project selects the best language, tech stack, hosting stack, etc, for itself, it creates an overarching complexity across projects. Fixing this requires lots of communication and leadership. Each project may need to select sub-optimal components (like language) for itself, but in doing so it can remove overall complexity.