Why do these emit more code?

Author: thinkyhead

Marlin/src/core/serial.h

@@ -184,6 +184,26 @@ void SERIAL_ECHO(T arg1, Args ... args) { SERIAL_ECHO(arg1); SERIAL_ECHO(args ..
 template <typename T, typename ... Args>
 void SERIAL_ECHOLN(T arg1, Args ... args) { SERIAL_ECHO(arg1); SERIAL_ECHO(args ...); SERIAL_EOL(); }
 
+// // Print a single PROGMEM string
+// template <typename T>
+// void SERIAL_ECHOPGM_P(T pstr) { SERIAL_ECHO_P(pstr); }
+// // Print a PROGMEM string, plus an arg, plus more
+// template <typename T>
+// void SERIAL_ECHOPGM_P(PGM_P pstr, T arg1) { SERIAL_ECHO_P(pstr); SERIAL_ECHO(arg1); }
+// // Print a PROGMEM string, plus an arg, plus more
+// template <typename T, typename ... Args>
+// void SERIAL_ECHOPGM_P(PGM_P pstr, T arg1, Args ... args) { SERIAL_ECHO_P(pstr); SERIAL_ECHO(arg1); SERIAL_ECHOPGM_P(args ...); }
+
+// // Print a single PROGMEM string
+// template <typename T>
+// void SERIAL_ECHOLNPGM_P(T pstr) { SERIAL_ECHOLN_P(pstr); }
+// // Print a PROGMEM string, plus an arg, plus more
+// template <typename T>
+// void SERIAL_ECHOLNPGM_P(PGM_P pstr, T arg1) { SERIAL_ECHO_P(pstr); SERIAL_ECHO(arg1); SERIAL_EOL(); }
+// // Print a PROGMEM string, plus an arg, plus more
+// template <typename T, typename ... Args>
+// void SERIAL_ECHOLNPGM_P(PGM_P pstr, T arg1, Args ... args) { SERIAL_ECHO_P(pstr); SERIAL_ECHO(arg1); SERIAL_ECHOLNPGM_P(args ...); }
+
 //
 // SERIAL_ECHOPGM... macros are used to output string-value pairs, wrapping
 //                   all the odd loose string elements as PROGMEM strings.