Comment by saghm

This is basically how I've always designed things, and I really feel like it's the best approach. Pick the right way to model data, and the algorithms will flow naturally from it. The cognitive load of reading "data" code rather than "algorithm" code is a lot lower in my opinion; reading through a bunch of declarative types like struct definitions isn't nearly as much work as reading through functions that operate on them, and moreover, it's a lot easier to spot any potential bugs in them because you don't need to maintain very much "state" in order to understand them. Maybe this is why I've generally found ECS conceptually pretty easy to wrap my head around (which is of course separate from whether it's easy to use or not, as that depends a lot more on both what the framework exposes and how a team chooses to use it).