Sales Pitch, really?
If I'd wanted a sales pitch I'd have gone to M$.com.
There's a lot more to data retention than cloud storage options. And the issues change with the geography - EU and US data privacy laws are markedly different and can result in alternate strategies having to be used in global organizations. As was mentioned, industry specific guidelines/laws exist but there are roles in most companies that have rules to be followed - financial, HR, and corporate records have different retention needs and these have to be maintained across data storage mediums (Peoplesoft/ JD Edwards vs email & Word/Excel docs) and these are the areas where most companies can get caught out.
Then there's the issue of litigation and eDiscovery - and there areas are dependent on well written/executed data retention plans.