OP_CAT is active via Signet, but I think not exist any chance of this pass as next soft fork for Bitcoin. I was searching about OpCodes and until on the Bitcoin Wiki, script part, they put this op as disabled. #bitcoin nostr:note1yw3l605pag9wjwf4ruf9g3vgup49a78dw320ja2ffzuj8xd49heqxfzsl2