Oh, I just realized I misunderstood your point. Because the data on disk gets updated while the in memory structures on the read only side don’t, you’ll get gar

Oh, I just realized I misunderstood your point. Because the data on disk gets updated while the in memory structures on the read only side don’t, you’ll get garbage and have to swallow random errors. I bet it only works in very specific write-once type environments like Netflix, because otherwise updating a file would lead to reading garbage on the other side.