Vlk
9
In addition to what kubecj said, I’d just like to say that even if we made e.g. the VPS that was in v892 a “baseline” (and make vpsupd.exe’s VPS diff’ed with respect to this baseline), it wouldn’t fit on a single floppy anyway. Our virus lab team is now adding signatures much faster than before and the size of the VPS is growing fast. 
I have just checked it, and found out that v 4.7.892 shipped with VPS 0702-1. The size of this file was 5,253,401 bytes. Now, the latest VPS version (as of today) is 0739-1 and its size is 6,930,892. So even the plain size difference is bigger than 1.44MB.
Cheers
Vlk