What twitter starting doing was removing blue checks from people who were causing problems for the platform (but not behaving bad enough to kick off). This made no sense because people still needed to know if a person was who he claimed to be (e.g., Milo Yiannopoulos) even if the person was controversial or problematic or just plain nasty.
Blue Checks weren't "gutted". Now they just mean something else -- you're a premium subscriber.