Our culture is to replace working things purely because they're old. Solved problem? Never heard of her.

APFS and BTRFS are objectively better than NTFS. Hell, even HFS+ and EXT4 already were.

And then there is already the next generation knocking on the door. BcacheFS is really cool and yet another step forward in performance and reliability.

Nothing stopping you from enjoying Slackware 11 on EXT2 though :)