I know. We made one of the first proper disk drive interfaces for it.
When it was done that was entirely rational. Memory was still very expensive and the machine was fast enough against the competition. What it lacked was reliability in its mass storage system. Losing computer data irretrievably is not something that any business user can tolerate.
Amstrad PCW had him for lunch by launching something that came with business friendly software and a cheap and nasty but much more reliable real floppy disk. The rest is history. Alan Sugar beat him hands down.