+1 woo
woo is required by a lot of businesses for compliance reasons; you guys can build the second coming … but; especially as you start dealing with large clients that want to do something other than ecommerce – they won’t let it in their infastructure because it’s easier to say no and maintain control than approve several options … same with Zapier (for example)
plus; sometimes there are 3rd party support involved that contract for specific things; and can push it out of scope… it’s crazy – but I’m working on pulling it into woo right now on a sub domain to act as a file server… they loved the theme, bought the product … but job one is to not let a “foreign” theme into production
May get them to bend a bit and do a hybrid – but it excludes a lot of buyers who may use the product in odd ways =p
From a dev commitment – the ROI would have to be solid; even if it was farmed out … Woo is huge
( sorry – integration wonk)