people on this site enjoy organizing their pet groups, and i think enabling groups inside groups (or sub-groups) would be an efficient way of of doing so!
this would stop the awkward and weird current way of organizing, using alphabetical ordering and entire groups for section names (see here https://imgur.com/a/lCIoWPC). it could also be a way of disabling trades for a selection of groups at once, but mainly it would just be a quality of life addition.
i have made some mock examples of what this could possibly look like:


bumping with either critique or support would be very appreciated :) hope this all makes sense and thanks for reading