Tree based textboard

What does /prog/ think about boards like treeboard[1] and ayashii world[2]?

[1] http://tree-board.net/
[2] https://sonzaishinaiworld.heliohost.org/bbs/bbs.php?m=tree

If anybody is actually curious, I'm rewriting TreeBB in English (the mirror is poorly google translated so far) and replacing all of the deprecated functions so it can run on PHP 7 or higher. Will enable anonymous posting as well, since right now the name field is required.