I've worked on a variety of different size apps, but I haven't run into many issues with state synchronization yet. Generally, I try to keep data as close to it

I've worked on a variety of different size apps, but I haven't run into many issues with state synchronization yet. Generally, I try to keep data as close to its source of truth as I can. So if I need to synchronize state between actors, it would be to achieve a task and not to have duplicated data. This could be an artifact of how I build systems. I have heard of some people that build really small actors and do a lot of data exchange. Without knowing details, I'd lean towards that being an anti-pattern.