I suspect most Americans with a passing interest in nuclear deterrence have heard of this.
Moreover, the article is almost entirely about the sentinel land-based ICBM program, which is only 100 B of those 1.5 T. I would argue it is pretty shocking how cheap our nuclear deterrent is, especially compared to our conventional military budget (1.5 T per year).
The article includes the suggestion that the land-based nuclear fleet may be superfluous, but does not even attempt to explore the game theory behind keeping it intact (E.g., nuclear missile failure rates, warhead fratricide, the historical difficulty of keeping a boomer fleet stealthy, etc.)