My reaction is to say that there are ways to do adventuring and dungeon delving better than B/X does, like ItO systems or even Trophy. The Grognard version of "system matters" says that there is no need to improve on the old designs, where there is actually plenty of room for it.

The concept of "better" is so subjective as to be pointless. B/X is what it is and it's fine. Those others are also what they are and they're also fine. It's exactly as absurd as the old arguments along the lines of "why do people publish new RPG systems, don't they know BRP already exists?"

I think DCC has blown that argument out of the water because it absolutely isn't a recreation, it's an attempt to emulate "vibes".