The SCAN website will have had its final web archive completed and all the content, apart from access to the Highlands and Islands Emigration records, will be available via National Records of Scotland Web archive.
The Highland and Island Emigration records database (HD4/5) is already available to search for free on the Scotland's People website. Researchers just need to register for a free account in order to search it.
There is also a supporting record guide for researchers which provides background information and explains how to search the database at the Scotland's People help and support guides.