Custom arduino (or equivalent) cheats and spoofed-identity DMA devices have, and continue to be a factor in the cat-and-mouse game. I think the reality is that

Custom arduino (or equivalent) cheats and spoofed-identity DMA devices have, and continue to be a factor in the cat-and-mouse game. I think the reality is that kernel level anticheats can be effective at stopping low effort cheaters, but they’re completely ineffective at stopping all cheats. I think the success with FaceIT comes from the fact that they offer a kernel level anticheat with multiple heuristics and a paid version that makes creating new accounts hard. In-contrast, TF2 has nothing and the game is free-to-play.