Meh he's still a high-tier but has been dethroned for so long it's wild that people still cope. I was one of the Boros defenders for a long time but this is just obscene. He simply is not in the same league as current top-tiers in any way. It's explicitly been made clear what the levels are here. You have the Blast-tiers or more fittingly God-tiers and above (Blast and co, Saitama, CF Garou, Void, and obviously God). Then you have the high-tiers (Orochi, Tatsumaki, Psykorochi, Monster Garou, Boros, etc.), and so on. Like it's not really THAT hard to grasp.