I use Concur as part of my job. It is stunningly, stupefyingly awful. However, it is popular with the kind of hyperglobocom companies that SAP deals with. I can submit expense reports (which take about as long as it would to scratch them into clay tablets) and I can book travel. That's about it. I imagine that -- for the anonymous finance dept folk who delight in taking weeks to examine my reports while I am legally…
Like here are things that you don't see as a user:
* Data feeds from various providers, each with their own formats.
* Rules-engines to route for auditing.
* Auditing UIs.
* Management reporting.
* Fraud analytics.
* Feeds to accounting systems.
* Feeds to payroll and corporate card providers.
* Support for constantly changing laws around taxation in various countries.
Those are all actually complex things that need to exist to be competitive for an enterprise system. Your fancy UI is one checkbox, but you're not getting the contract against someone who does all those other things.