About tank destroyers

The_Chieftain: S-Tank was a tank, not a TD.   There are plenty of tank destroyers still in service, though certainly they prefer to use ATGMs these days as opposed to direct fire cannon. Still, such cannon-armed TDs do still exist.   2S25 is a Russian one. B1 Centauro from Italy would be another. China has the PTL-02, having only just retired the Type 89 (which wasn't bad, but used NATO ammunion, so was a bit out of place). Looks like PTL-02 is being replaced by ST-1.   I'm sure there are plenty more, but I don't have my books handy.