Core v30 tweaked defaults, not consensus.
While you are correct, that is not the full story. First core said they would remove the filters. When that caused controversy they said they would first mark the filter as deprecated and change the default setting. And completely remove the filter at a later time. And now, they are saying they are only changing the default setting and marking it as deprecated. And they assure us that marking it as deprecated is nothing to worry about.
I am a coder. They can't fool me. Given that they already said they would remove the filter, and they marked it as deprecated, it's obvious what they have in store.
You are not forced to relay or mine bigger OP_RETURN.
That is a pretty significant claim when you consider core is responsible to maintain 75% of the nodes code. But that 75% number is declining at an alluring speed. Core will be put in their place. They will either clean up their act and reconsider their stance on fighting spam, or they will be defunded are thrown into the dust bin.
If bloat or liability worries you, prune, use blocksonly, and lock your own policy.
What worries me is not bloat or liability. At least not right now.
What worries me is that core devs appear to have been compromised.
What worries me is that while core claim they are only changing the default settings, one of them - Shitcoiner Peter Todd, is effectively spinning a fork of core designed to be a private network of nodes geared towards spam miners (Mara and F2Pool) so that they may skip the rest of the nodes filters and propagate spam transactions to each other.
What worries me is that when the Slegwit update turned out to open the door to spam, core did nothing. Told us they can't stop it, and even if they could, they shouldn't. And when the Taproot update also turned out to open the door to more spam, core did nothing, told us they can't stop it, and even if they could, they shouldn't.
Now they are not even turning a blind eye to spam, they are effectively offering it a seat a the adult table by attempting to blow up the op_return limit.
What worries me is that core shitcoin devs are effectively attempting to turn our perfect money into a cloud repository of dick pics and child p**n.
Knots ships stricter presets, but stock Core can match them with a couple lines. OP_RETURN does not grow the UTXO set.
That is mighty big of them - our expert overlords - to allow us - ignorant non technical plebs - to have control over our own software, what we put in our own mempool, and what we want to relay to other nodes.