It makes a difference for Serial programming, where cap helps make a reset pulse, and ICSP programming, where the programmer holds reset pin low to access the memory more or less directly via SCK/MOSI/MISO.
It makes a difference for Serial programming, where cap helps make a reset pulse, and ICSP programming, where the programmer holds reset pin low to access the memory more or less directly via SCK/MOSI/MISO.