It's not true that Taibbi's posts can't be searched. It works normally for me.
At the same time, the feed of the Bellingcat reporter that broke the story of the top secret US document leaks errors out for me. But I see him talking to other people normally when someone quotes his tweets.
I think that Twitter is just breaking due to lack of maintenance.
@chadloder @mmasnick I believe you, but by now I can't reliably distinguish Musk stupidity from general breakage.
@werner58 @mmasnick Musk changed it back. It was true when published (I tested it myself)