Plug-ins would be win-win with RM:
it is like having free extra developers and their customers might be more faithful if we offer them more opportunities to work on the entire database.
For customers it is like having personal specific solutions without having to go through the SQLite software choice and download, rmnocase issue and finally launch queries that they don't understand and that fail every time they try to adapt (I have been there).
The RM SQL community is quite small now because of those barriers and opportunities completely underused. It would be so nicer if when someone starts a discussion or something (s)he would like to have in RM X, we could write them a plugin that does it right away and they could relaunch any time they want.
For my part, I would love to make my plugins to refresh my groups. For example I realised I wanted to colour the children who died before they could marry (and have children, which I set up at 18 but I can change it) after I had been wasting my time on 10th of websites looking for their spouses. And weeks later I would re-try to find a spouse! In family view, I should see a red triangle (=spouse) next to each children or (s)he should be coloured and no research needed. It is also easier to exclude on the spot when I want to add someone with same name. So I use SQL to identify them and update the group 'ChildDeath' that I can colour. Using a plugin would be quicker than opening the database in SQLite, finding the query, execute it and colour the group in RM...nearly every time I add a couple before 1925 with all their children.