Event Sourcing / Kappa Architecture with GDRP is going to be a fun challenge. How do you delete something from a sequence of events that's intended to be immutable? Simply tombstoning entries apparently isn't enough; the law will actually require wiping data, hah.
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deleting from kappa is actually quite easy. you just choose not to replicate a certain piece of data and only keep the hash (some lawyer would need to answer if a hash violates GDRP)
Oh hey, yeah that actually makes perfect sense! Glad hyper{core,drive,db} support sparse replication 
