The core is very extensible.
But when analysising the Gallary implemention running on top of the Orcharg Core i coudl not believe how much code was required in Gallery.
I hate to be negative, but the first thing that comes to mind is if allot of the code in Gallaery is going to be refactored back into Orchard Core.
I know the first thing someone woudl say is that this is scope creep and code bloat.
However looking at Gallery there is just so much code i cant believe it