This works fine with text fields, but if I true to set {{true}} in Restrict Editing of a Check Box, I can still change the value and the Save/Cancel buttons show up.
It also looks like if I set the Type to Checkbox there is no option to select Make Editable, so it’s always editable?
This is currently an issue with the complex column types- dropdown, checkbox, etc type columns don’t support being disabled yet but we’re working on it! We’ll post back in this thread with any updates 
Once you get to it, would be nice to have proper support for restrictive editing for new rows being added inline as well. Right now dynamically restrictive columns default to disabled when adding a new line.