What are the other options exactly?
Part of the problem is monolithic, kitchen-sink software. Most people are basically using SAP/Peoplesoft as a development framework anyway – playing into more vendor lock-in. It's like the Lotus Notes of the aughts.
There are tons of targeted solutions that can play nice with intelligent use of modern, open data interchange protocols.
There are a couple open source ERP products, Compiere which is technically open source but uses a service model. However, the most interesting open source ERP is by far Openbravo. If you're question about other options was serious, you should look into using Openbravo: http://www.openbravo.com/about-us/
When I open a software demo video, I want over-the-shoulder or screencast-style video of the software in action. I do not want the Comic Book Guy narrating Wikipedia's definition of 'agility'.
To say that SAP ERP doesn't scale on the other hand is a bit nuts. It scales easily to the biggest companies in the world. Apple iTunes Store sales billing runs on SAP.
I've not spent a lot of time looking at open source ERP in the context of large enterprise. I'd be interested in a serious comparison of the contenders and their UX, ability to scale to many countries/currencies/languages and their ROI and supportability and extensibility.