[RodgerTheGreat]

No commercial demand.

The K2 GUI was very handy for programmers, for rapid prototyping, but it is impractical to use it for making visually polished UIs you would give to a customer.

If a feature of K doesn't pull its weight, it is removed.

[throwaway7645]

Gotcha...I would assume to leave it in for use in interactive data analysis, but if you REALLY want to keep things small...

[RodgerTheGreat]

Arthur starts over completely from scratch with each major release, and abhors drawing in dependencies. It's a good strategy for traveling light.