Hi @SilasHanneman In our Faculty we have a number of colleagues who prefer to manage all their Major Project / Dissertation students for the year in a single Canvas site. The complexity has to be handled somewhere - one colleagues has full time and part time cohorts in the same site - so that's six cohorts and eighteen assignments per year (there isn't currently a solution that would give each the same assignments, so these must be duplicated).
Contrary to @mzimmerman 's experience, we are crosslisting sections / cohorts which are in different terms.
However, we draw the line (in all but one case) of running crosslists into the followin academic year (except where the delivery started in the previous academic year).
The important point (also covered elsewhere) is that your SYS generates assessment lines specific to sections/cohorts, and that any comms, activity etc is set to specific sections (even if all of them).
The assumption is that all members of the site have the same materials so pages are not capable of being set to section - in this case use discussion or assignment pages which do have section capability/
Hope that helps