I always thought the special thing was the way file saving was done, especially if you had something like ArtWorks and Impression up at once and wanted to save between them.

Definitely miss mine - and it still amuses me how things it handled so easily like having a common vector file format or decent anti aliased text took so long for the rest of the world to get near.

Zarch/Lander was impressive, but seeing Sibelius running for time was astounding.