Amazon has fully embraced BaaS. And I don't know of any AWS services they've added and then removed. I think Amazon will be the winner here. MSFT is also starting to embrace BaaS. Of course they have a less stellar history of support.
> Of course they [MSFT] have a less stellar history of support.
Microsoft supported products:
Azure - six years, .Net & Active Directory - thirteen years, SQL Server - seventeen years, Visual Studio - nineteen years, and Excel - twenty nine years.