I mainly use mobile sams as escorts. Also its nice to have some in
the interior for military police, and with rails you can move them
to a spot under constant bombardment.
In my games the city govenors always produce mobile sams. its
thier build preference. when I have immense empires I try to
manage production but i always wind up with too many sams. Its
really annoying. Does anyone knoe why, or is it that stupid A.I.
thing again.