In case you haven’t seen it, the release notes for 6.18 have detail on the new approach for restricting “Simple Edit Users” in the post-Edit+ future.
https://docs.squiz.net/matrix/version/latest/release-notes/6.18.html
I think this is a significant milestone for v6 and should make upgrading feasible for a lot of sites hanging on to Edit+.
@Bart is it possible to get the code tarball updated to 6.18 so we can kick the tyres on the new restrictions features? Keen to check the edge cases like what happens to users in two groups with different restrictions so we can make a plan to upgrade for reals.