Common knowledge: You had to swap disks constantly
Why it's wrong: Yeah, psygnosis had a unreasoning fear of the external disk drive, but most games supported multiple drives (could DOS even do this without installing to a hard drive?) and virtually every large game had a hard drive installer. WHDload of course changed that game as well
Actually most games did not have any HD installer even if it came on 10 floppies. The reason for this was because most games was not system friendly at all and had their own bootloader that bypassed amigaos afaik.
The a1200 and a4000 should have had a cdrom drive by default in my opinion. PC's that came out at that time all had cdrom.