re: #24 Obdicut

The treaty doesn’t limit our build-up

Per the Russians, it certainly does. The Russians reserve the right to pull out of the treaty if US missile defense actually renders their offensive capabilities ineffective. That, of course, has always been the primary strategic value to such a system, to prevent ICBMs from reaching our shores.
I don’t think you can really say this does not limit the US ability to build missile defense under the agreement.