Why would fair use law go away? Fair use for the purpose of critique is maybe the best & most favored defense of fair use by the Copyright Office, and ties together necessary copyright exceptions for supporting Free Speech and journalism, among other good reasons. Things also seem to be moving in the opposite direction with recent precedent deeming some AI uses transformative fair use. YouTube has done more that it’s fair share of playing fast and loose with copyrights for a profit, but YouTube, and more broadly Google, depends on fair use for massive portions of their business. I don’t see fair use going anywhere anytime soon.

I've read criticism of media I've never even heard of (and learned some insightful things), so clearly the original IP isn't always the pull, and even if it was I don't understand how talking about something suddenly means I need to pay the person who owns the intellectual property of the thing I'm talking about. I think it would make criticism less likely and put us in an even worse situation than today, when large corporations often use the DMCA to take down clearly fair-use criticism. Just a further stifling of speech.

Also, fair use has been around since the eighteenth century, even if in the US the US 1976 Copyright Act made fair use statutory.