On the contrary, that's exactly what “modern” sounds like. I wonder when all those tools will go unmaintained. Coreutils, with all their problems, are maintained since before authors of many listed tools were born.

That's the Lindy effect: old tools like ls last because they've already lasted, while modern ones often don’t stick around long enough to.

    the future life expectancy is proportional to its current age

https://en.wikipedia.org/wiki/Lindy_effect

Literally the next line lists its replacement eza.

like good open source, it's now forked by a community instead of having only a single maintainer

eza: https://github.com/eza-community/eza