In the blocks meta issue in GitHub we have Add a system of page-less nodes #100 listed as what seems to have initially started as a task/request for fieldable blocks in core, but has eventually evolved into the "rabbit hole" feature for content types (which is awesome by the way 👍). ...I'm trying to wrap my head around use cases for fieldable blocks in D8/D9, and if the respective feature we have implemented in Backdrop core is enough to cover those use cases.
I'm already aware that we have the "Existing content" block type, and also that we are able to place individual fields as blocks (provided that the context specified for the layout is set to
node/%) ...what I'm trying to figure out though is things we are missing w/o fieldable blocks in Backdrop. Do others have any use cases to present? Do we have equivalent solutions/workarounds for those in Backdrop?