Why no ugrep in portage?

[Punchcutter]

I've just discovered this very old and powerful utility, seemingly a drop-in replacement for standard grep with a lot more power:

https://ugrep.com/

Normally I would expect something like this to definitely be in the main portage tree. Any idea why it's not?
Is there some reason why this has been explicitly rejected for inclusion in Gentoo? Or is it just an accident
or coincidence that no one has stepped up to put it in and maintain it?

[arran4]

Looks like an older version is in guru:

https://gpo.zugaina.org/sys-apps/ugrep