Dear SAP
Look at Salesforce.com
Are you really prepared to invest in DC's at levels similar to AWS/Azure/Google?
Thought not - just choose one of them and work out how you can work together to grow your business.
I know it's against your natural inclination to try and provide a better customer service, but you never know - it might be the change that provides growth and increased revenues instead of waiting for a competitor to do this and start taking your customers from you. Something that you will realise too late and not be in a position to address when revenue starts to decline, the costs of your existing DC's spiral and you realise that you need more investment than you can afford to keep up...