The secret has been out for 40+ years. The Sagger decimated Israeli tanks in the Sinai in 1973 until the IDF started using combined arms tactics. The TOW (and to a much lesser extent, the Dragon) gave NATO the ability to blunt a potential Soviet invasion of Europe. The Hellfire (and to a lesser extent, the TOW) dominated Iraq during the Desert Storm, and during the Iraq invasion in 2003. The Javelin itself is almost 30 years old in design.

The only reason we're hearing so much talk about the Javelin/NLAW is because of cheap cellphone videos capturing so much of the war in Ukraine. (And extremely poor Russian tactics...)