I agree generally, but some of these enterprise contracts are eye-watering. If the choice is $2M/year with a 3-year minimum contract, or rolling your own, I think calculus really has shifted.

With that said, the entire business world does not understand that software is more than just code. Even if you could write code instantly, making enterprise software would still take time, because there are simply so many high-stakes decisions to make, and so much fractal detail.