It could be because MSN's partner in the DMS market (Reynolds & Reynolds) killed its MSN based DMS known as The Saturn Project / E2 / Grand Slam / Generation Series.
It could be that this is a $2B / year market MSN has virtually no presence in.
It could be that retail automotive is a $700B / year market with dreadful B2B and B2C connectivity... and the 20-30 year old DMS's are big culprits.
Having been the COO and founder of a web-based DMS company
Darwin XE | Comprehensive Dealership Management Software
I will say that MSN has their work cut out for them. No slight on them, it is just a lot to do and in a mission critical (ERP) environment to do it in. The integration, service and parts requirements across the multiple OEM's aren't that difficult technically, but as a workflow enablement system they are a dog's breakfast to make substantially better... and users love it when better (different) gets jammed down their throat.
eCommerce (consumers buying from dealers) is sooooo much more exciting... and value added.
Doing due diligence on a DMS is like watching fresh paint dry. Boring as anything and after a long time there is really no way to know if you are done except to touch it... and by then it is too late if you made a bad decision.
Being an entrepreneur, I always ask:
"What is it that will make MSN successful in this market?" Lower price? Better what? How does the dealer make more money by buying MSN over xyz?
Having large sums of money doesn't ensure success (but it does help). They would have enough to buy a few dealerships to insist their pilots use the software.
Beyond MSN's technical risk in entering a space it knows little about and has no sales distribution in... these are the big questions everyone in retail automotive should be looking to MSN for answers on... because that is where MSN's entry will be successful (or not).
If the goal is change, then the answers should be compelling and clear... and better than SAP's now that it too is likely making a foray into DMS.