[zozbot234]

CSR is an array-based trie hence very costly to update. It can serve as an index for parts of the graph that basically will almost never change, but not otherwise.

[adsharma]

Makes it a good match for columnar databases which already operate on the read-only, read-mostly part of the spectrum.

Perhaps people can invent LSM like structures on top of them.

But at least establish that CSR on disk is a basic requirement before you claim that you're a legit graph database.