I was really excited to look through SS's site, data, etc., thinking it makes much more sense than most overkill CMSs, and most minimalist CMSs. Everything was a go, until I couldn't find info about user management, user registration, etc. There's plenty of backend user types for handling site assets.
But the biggest asset of all are the public users, and membership sites create a lot of possibilities for dealing with one's constituents.
I found forum posts of others with similar requests. And sadly, I'm not a coder so can't help contribute to the motion.
But to list some key functionality I was searching for, which isn't a lot different than anybody else's list I'm sure:
Self registration, two step confirmation (email reply confirms), user profiles (public &/or private), etc.
Then, some fairly atomic access permissions on sections and pages - or permissions associated with just about anything manageable by the CMS in the admin screens.
Among the issues I'm currently trying to solve, while also finding a modern, and realistic CMS that small to mid-size clients can handle are:
1. Currently, a client needs a file download mgr for their customers (professional group that generates fairly large PDF reports for customers); site owner uploads the file(s) to the customer/siteuser's file store, email notification, user comes & downloads file, etc. Customer can only see his files. Don't particularly need customer uploads.
2. Also, a client needs a CMS, and also needs a somewhat modest intranet behind it. So user registration and permissions are needed there too.
SS is clearly high on my list now, and is oh so close . . .
Thanks for the work of all contributors.