> "They do not support sound or graphics"
Hmm. Mode 7 is certainly neat but a big draw with BBC BASIC is the ease with which the other modes that do support graphics can be used and, of course, sound. For example, there's a crazy version of Axel F written in BBC BASIC out there somewhere.
(The other really cool thing is the BBC Micro had a built-in assembler so you could embed assembly language directly in your BASIC program.)