I disagree. Most user-facing apps I've seen in my career don't really need strong consistency. The question is the performance of eventuality for propagating c

I disagree. Most user-facing apps I've seen in my career don't really need strong consistency. The question is the performance of eventuality for propagating changes. If it's sub-second level, I'd say 99% of apps (of those which don't need strong consistency) can live with that. Single-digit seconds could still serve many purposes.