True! Bob Frankston actually worked super hard to get VisiCalc's code to fit inside 16KBs so it could be used on the lower-end Apple II. But he couldn't make it happen. So it only ended up as usable on the more expensive $2,500 Apple II
Nowadays, they'd just cut features from the 20KB version to make it fit into 16KB and sell it as the Standard edition (and sell the full 20KB one as the "Premium HD+" edition).
