But the thing is, SAP is a freakin' huge company and the software is quite old. They are on the right track to make things better (XSA, other data exchange format).
Another funny story is that some customers decided to host their system at SAP. The SAP department (SAP HEC iirc) that took care of updates of the systems planned with 14h per system per update - complete downtime. One customer had 3 systems at SAP, which meant that it took three Sundays until all systems were updated. Since then, most moved to OEDIV for hosting which does a slightly better job.
SAP HANA (the DB) is quite cool though. We had one with 4TB RAM and it was super fast.