Slow, buggy and resource hungry. Faster spdk-based engine rewrite has been on the way for like 7 years now
4+2 Erasure Coding has only half the storage overhead of 3x replication but the same fault tolerance
Also re spdk
https://muratkarslioglu.com/blog/io-uring-spdk-kernel-bypass...
Edit: skimmed it, classic AI "analysis" - totally ignores all the crap io_uring went through