Given that Inscription based fees represent only a negligible (~0.1%) addition to miner profits after hashrate and cost adjustments, and with added risk of transmitting illicit material, miners might be more careful in accepting 4MB files for confirmation, don't you think?
Discussion
are you asking if miners are going to start widespread censoring of valid transactions in bitcoin? i doubt it. even if one did another wouldn't. otherwise bitcoin wouldn't be censorship resistant.
No, they can easily not update to v30 or not run libre relay, but instead continue running v29 with their data carrier preferences and still be within protocol rules. They would thus be exercising their choice. If more become aware of this, the propagation path would remain niche and limited. It's their choice to make. Looking forward to seeing how this unravels.

you can't stop economically motivated actors from getting around it. its not hard to run libre relay over core or knots.
This is like claiming there's no risk/reward. For negligent upside and exceeding risks, they might choose not to. If most chooses not to, the propagation path remains limited, as currently. These are just possible scenarios, you might be correct to bet on human greed.
One does nit have to call it greed. But it is the best bet, that a majority is intrested in a working businessmodel. And inclusive businessmodels offer more opportunity than exclusive ones.