Judo's de-emphasizing of ground work (besides pins) was due to the fact that as it became a sport ( eventually an Olympic one) the ground work was viewed as boring and time consuming ( and still is).
Now, there are many systems of judo ( while Kodokan is the mother style), many masters decided to NOT strictly focus on Olympic comps and retained the 50-50 balance of stand up and ground work.
Combat Judo as they tend to refer to themselves ( systems like Kawashiki Judo) are more fighting oriented, more self-defense oriented and keep a balance of ne-waza and nage-waza and strikes are incorporated in BOTH aspects of the game.
BJJ toke the ground work of basic judo and put it on a whole other level and submission grappling took it even beyond that.
That said, outside or grappling purists, you won't see much popularity of grappling only tournaments, certainly not compared to boxing or whatever.
As for MMA, it will always be about using what works best in the ring, period. Regardless of where it comes from.
Psalms 144:1
Praise be my Lord my Rock,
He trains my hands for war, my fingers for battle !