Peter Skelton wrote in
:

[snip]

Aren't the small, modified AA missles supersonic, small and about
as long-ranged as harpoon? They've a much smaller punch -
nothing's free, as you say, but they'd be likely to hit against
current defenses.

And taking a hit from several hundred lbs of metal + 80 or
so lbs of blast/frag warhead at M3 has a quality all its own
so to speak.