Hello,
I need to have a carousel of pictures for my groups. I already have an item type for that which is very handy because it is fast to implement as a field in another item or a paragraph, it has responsive support (the user can select a device size), and the user can fill it with as many pictures as s/he wants. However I cannot use it as a group field : indeed, the choice for the type of the group field type is very limited. Instead I must spend quite some time creating the field for each image one by one. It is cumbersome (both for front and back-end) and the user is then limited to the amount of images fields I bothered to create (not to mention that the number of images is multiplied by the number of device sizes supported).
I think it could be a very handy functionnality to be able to use items as group fields, especially as it seems that you are pushing the use of items more and more.
Thank you !