New metric: ImmediateCheckpointMiss. Deals with taking your foot off of a checkpoint hold. If true, you miss checkpoints near instantaneous. If false, TimingWindowSecondsHold in Preferences dictates how much time you have left to put your foot back down.

stepmania/Themes/default/metrics.ini

@@ -2387,6 +2387,7 @@ CheckpointsUseTimeSignatures=false
 InitialHoldLife=1
 RollBodyIncrementsCombo=true
 CheckpointsTapsSeparateJudgment=true
+ImmediateCheckpointMiss=false
 
 [PlayerShared]
 Fallback="Player"

stepmania/Themes/pump/metrics.ini

@@ -23,6 +23,7 @@ ImmediateHoldLetGo=false
 RollBodyIncrementsCombo=false
 InitialHoldLife=1
 CheckpointsTapsSeparateJudgment=false
+ImmediateCheckpointMiss=true
 
 [ScreenGameplay]
 FailOnMissCombo=51

stepmania/src/Player.cpp

@@ -135,6 +135,7 @@ ThemeMetric<bool> IMMEDIATE_HOLD_LET_GO	( "Player", "ImmediateHoldLetGo" );
 ThemeMetric<bool> REQUIRE_STEP_ON_HOLD_HEADS	( "Player", "RequireStepOnHoldHeads" );
 ThemeMetric<bool> ROLL_BODY_INCREMENTS_COMBO	( "Player", "RollBodyIncrementsCombo" );
 ThemeMetric<bool> CHECKPOINTS_TAPS_SEPARATE_JUDGMENT	( "Player", "CheckpointsTapsSeparateJudgment" );
+ThemeMetric<bool> IMMEDIATE_CHECKPOINT_MISS	( "Player", "ImmediateCheckpointMiss" );
 
 
 float Player::GetWindowSeconds( TimingWindow tw )
@@ -2611,7 +2612,7 @@ void Player::CrossedRows( int iLastRowCrossed, const RageTimer &now )
 					continue;
 
 				viColsWithHold.push_back( iTrack );
-				if( tn.HoldResult.fLife > 0 )
+				if( ( IMMEDIATE_CHECKPOINT_MISS && tn.HoldResult.bHeld ) || tn.HoldResult.fLife > 0 )
 				{
 					++iNumHoldsHeldThisRow;
 					++tn.HoldResult.iCheckpointsHit;