HI Dave
It would be useful on both. On this occasion it was for record list pages. My client has an ecommerce site with 1000+ records in a section editor called 'products'.
They would like to manually group products together.
I have installed the 'insert item here' plugin that solves the problem when uploading new items, but they have lots of old records that need to be moved.
We've looked into grouping by tag and a 'you may also like feature', but for this particular scenario there are no hard rules as to when the grouping is required.
Jeff