Originally Posted by
Ldnn1
It's a good question. It would also align with AA's Main Cabin Extra (with AA now having Premium Economy as well).
I'm sure BA have looked at it but not yet had a convincing business case and/or resources to introduce it. That may or may not change in future.
As far as I'm aware, AA don't sell main cabin extra as a separate option like VS does with their Economy delight. Personally I don't see it happening on BA.