well I wouldn't say that is a enterprise pattern, more like a "big online shop with dozens of users"-pattern.
When your users are below a certain threshold CQRS/Event Sourcing that pattern would be a extreme overhead.
(And I'm not sure if .NET made them popular, the only thing I know is that microsoft actually has very good documentation about them and martin fowler actually made good block posts about it in early as of 2005 or so, but the first time I heard of it was probably in Object-Oriented Software Construction (Java Book))
