docs: Update Channels docs

docs/content/developer-guide/channels.md

@@ -10,7 +10,7 @@ Channels are a feature of Vendure which allows multiple sales channels to be rep
 * Set a channel-specific currency, tax and shipping defaults
 * Assign only specific Products to the Channel (with Channel-specific prices)
 * Create Administrator roles limited to the Channel
-* Assign only specific Promotions, Collections & ShippingMethods to the Channel (to be implemented)
+* Assign only specific Promotions, Collections, ShippingMethods to the Channel
 * Have Orders and Customers associated with specific Channels.
 
 Every Vendure server always has a **default Channel**, which contains _all_ entities. Subsequent channels can then contain a subset of the above entities.
@@ -23,6 +23,4 @@ Use-cases of Channels include:
 
 ## Multi-Tenant (Marketplace) Support
 
-In its current form, the Channels feature is not suitable for an out-of-the-box multi-tenant or marketplace solution. This is because several entities which should be isolated in a true multi-tenant system are still shared across all Channels.
-
-Multi-tenancy could still be achieved through a dedicated plugin, and indeed there are some community projects underway in this direction, but would require significant custom work. An out-of-the-box solution will be considered for a future plugin offering.
+Channels can also be used to implement a multi-tenant or marketplace application. In such a setup, each merchant would have their own dedicated Channel and would be granted permissions on that Channel only.