As a US researcher (social sciences) who left, I warned my EU colleagues not to go to our big conferences. They were floored. Many thought it wasn't that bad, but the selling point that worked is, "do you want to risk being on the wrong side of an unaccountable border agent who hates how you look?" A gulag, literally a fucking gulag in a foreign country, could await. Its not worth the risk.
However, context. What I dont appreciate about these articles is that they assume a broad ban on the US because of morals, ethics, national pride, or solidarity. Nope. It's risk. Hubris and prestige of a career trump all other things. That simple. These same researchers still go to Hungary and Turkey. Its really discouraging to me as a critical theorist.