I agree with the speed issues, but resilvering due to diskcorruption is faster than raid, which is left out, as is the problem with single redundancy ambiguity in raid that raidz fixes. The checksumming is also fantastic in very specific cases, including where sata checksumming is insufficient. The old example is a mechanical drive in a laptop which is reading or writing when the laptop gets moved. Kinda applies to mid level datacenters in earthquake regions too. But also applies to any kind of shitty cheap laptop drives, and similar.

I also think the article underestimates the value of compression, its insane for the file formats to include it at all, its absolutely a filesystem property. How much and how hard a file should be compressed isnt known on creation, its known by the server that is currently providing it to users, meaning precompressed files are always either to strongly compressed, or not strongly enough, and often using custom shitty compression. Its also great for many kinds of research and engineering workloads where data does not have built in compression, or generates intermediate files.