1991-1994: They nuke Moscow.
1994-present day: American strategic deterrence takes over.
If any part of that is unclear to you then I urge that you reread the Budapest Memorandum on Security Assurances and return to the discussion with the rest of the context.
Anduril does not manufacture strategic deterrents. If you think they're the solution to the Budapest Memorandum then you're the sort of armchair YouTube General that the Army filters out in officer school. It's not hard to understand, anyone can Google the difference between strategy and tactics.