The only way it’s "bad" is in the sense it limits the flexibility of
snippets, like "<s". As you point out, if I add "<sr" as an "src R" block
I can no longer have "<s" as plain "src" block.
May be have "<ss" insert plain source block, "<ee", plain export block?
I missed this in the original conversation, but in the cases where plain source/export blocks are inserted, does the point move to where the language/backend needs to be typed?
i.e. you insert a plain source block and point ends up where "|" is shown below: