Swapped custom validation on @stencila's Sibyl for native validation, ughh - why didn't I figure this out years ago 
https://github.com/stencila/sibyl/pull/63 …pic.twitter.com/wwOiiYR2lB
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Oh, this is also a fun example of using vector clocks to determine if a component should update. Feels much simpler than (shallow) compares
Vector clock is a fancy word tho. All it means here is updating a counter when data changed. If counter changed, component should re-render
