From 2 years ago:
"I think it's unlikely that Bitcoin Core is going to make any changes in regards to OP_RETURN"

GitHub
Remove arbitrary restrictions on OP_RETURN by default by petertodd · Pull Request #28130 · bitcoin/bitcoin
Any number or size of data-carrying OP_RETURN outputs are allowed, and the -datacarrier option is removed. For those who want to limit data carryin...



