So? Linux is still mostly on ext4, and even though there's theoretically zfs/btrfs, most people are still using ext4. Debian installer still only supports ext4. ext4 might be "newer" than NTFS (2006 vs 1993), but that's a purely naming thing. If you map ext2 and ext3 as NTFS versions[1], they have similar age. Moreover from a feature set perspective they're mostly equivalent. Both support journaling and various features like sparse files and resource forks.
So? Linux is still mostly on ext4, and even though there's theoretically zfs/btrfs, most people are still using ext4. Debian installer still only supports ext4. ext4 might be "newer" than NTFS (2006 vs 1993), but that's a purely naming thing. If you map ext2 and ext3 as NTFS versions[1], they have similar age. Moreover from a feature set perspective they're mostly equivalent. Both support journaling and various features like sparse files and resource forks.
[1] https://en.wikipedia.org/wiki/NTFS#History