So, you may have heard that Sandboxed solutions have be deprecated in SharePoint 2013. This was one of the big news items that came with the new version of the product along with the new SharePoint App Model.
That’s not entirely correct.
User code is deprecated. What does that mean for us as developers?
Simply that we can safely continue to use sandboxed solutions to deliver declarative customisations to our SharePoint site collections. Things like Web Templates, Content Types, Custom List definitions etc., are all still supported and will still be so for vNext.
I’m really happy that this clarification has been made, and confirmed by another source inside Microsoft. This makes the future of delivering customisations to SharePoint Online and at a Site Collection level much clearer.