Technically feasible, practically worthless. This is a weapon that in no way alters the balance of geopolitical power, it isn’t an effective first strike, and it would be an insane vehicle for a conventional payload. This is posturing, dick swinging, whatever you want to call it, and possibly cronyism depending on who did the R&D.<p>Unless Russia has airtight missile defense or a means to track down every nuclear sub in the oceans, nothing has changed. The one thing this might do is further terrify their regional enemies, most of which were already terrified.