Commodore's BASIC 2.0 was already in ROM on every C64 motherboard. You can't just add Simons' BASIC to the ROM without a hardware revision, and doing a board re

Commodore's BASIC 2.0 was already in ROM on every C64 motherboard. You can't just add Simons' BASIC to the ROM without a hardware revision, and doing a board revision costs money . The cartridge was the practical solution