Why hasn't there been a feature-complete ext4 driver for Windows yet?

This page summarizes the projects mentioned and recommended in the original post on /r/filesystems
Btrfs

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  • Ext3Fsd

    Ext2/3/4 file system driver for Windows

    • There's the once-well-known ext2fsd, but it has become abandonware for ~5 years, and it causes lots of trouble on newer Windows versions. Bo Branten took a fork of it and fixed some of its bugs two years ago, but he has yet to add any missing features like journaling or ACL.

  • Ext4Fsd

    Ext4 file system driver for Windows

    • There's the once-well-known ext2fsd, but it has become abandonware for ~5 years, and it causes lots of trouble on newer Windows versions. Bo Branten took a fork of it and fixed some of its bugs two years ago, but he has yet to add any missing features like journaling or ACL.

  • InfluxDB

    Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.

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  • btrfs

    WinBtrfs - an open-source btrfs driver for Windows

    • Intriguingly, there is a highly elaborate Windows implementation of btrfs out there, which has been iterating for more than six years! In addition to following recent upstream development like zstd compression and space cache v2, the driver even supports fancy things like Linux-to-Windows user mapping and metadata passthrough to WSL! Of course btrfs is not nearly as widely adopted as ext4; yet btrfs-on-Windows is in a much better state than ext4-on-Windows, thanks to maharmstone's great work.

NOTE: The number of mentions on this list indicates mentions on common posts plus user suggested alternatives. Hence, a higher number means a more popular project.

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