>While the C64 does have a cartridge and tape deck port, most games were sold on floppy disks.

In the US. While disk drives were essential there, in Europe tape was standard in the 8-bit era and even most commercial software was sold on tape.

I (a youngish adult, in the US) had a 1541 drive that broke. I was in love with the "Silent Service" submarine game, and found an ad in one of the computer magazines for a cassette version of the game that I ordered from England. It arrived in a couple weeks, and I had my favorite game again! Thank heavens the lower tech Brits!