[shakna]

How do you rework a core process, then? If you rework a major unit that touches just about everything... Sharding something like that can break the actual improvement it is trying to deliver.

Like... Increase the performance of a central VM. You'll touch every part of the code, but probably also build a new compiler analysis system. The system is seperate to existing code, but useless without the core changes. Seperating the two can ruin the optimisation meant to be delivered, because the context is no longer front and center. Allowing more quibling to degrade the changes.