Iโm seeing lots of speculation around the financial motivations with regards to modifying OP_RETURN standard core policy.
In 2023 Peter Todd was transparent with his financial incentive ($1000 from Christopher Allen) for making pull request 28130, which was ultimately closed

GitHub
Remove arbitrary restrictions on OP_RETURN by default by petertodd ยท Pull Request #28130 ยท 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...