At least some mil-int types have paid attention to the fact that the missile was of a MIRV (Mulitple Independent Re-entry Vehicle) variety, which is normally strongly associated with nuclear weapons.

Russia is clearly giving them a message. It seems it's been picked up. Hopefully they take heed.

https://www.dumptheguardian.com/world/2024/nov/21/putin-says-russia-fired-experimental-ballistic-missile-into-ukraine

“Whether it was an ICBM or an IRBM, the range isn’t the important factor,” Fabian Hoffmann, a doctoral research fellow at Oslo University who specialises in missile technology and nuclear strategy, told Associated Press. “The fact that it carried a MIRVed [multiple independently targetable reentry vehicle] payload is much more significant for signalling purposes and is the reason Russia opted for it. This payload is exclusively associated with nuclear-capable missiles.”

While Putin has previously stated that western decisions to supply Ukraine with long-range weapons would lead Moscow to treat those nations as parties to the conflict, his warning on Thursday marked his most explicit threat yet about striking western countries.