It's kinda at the heart of the game though, even now. I mean unless you don't care at all about the cosmology of the planes hehe. But its ok, just because a player doesn't care, or have any desire to situate their character concept in relation to the Axes of alignment, doesn't mean the architecture and broader conflicts of the game universe aren't still organized around it, even if things have shifted a bit in the last 20 years. 3rd edition removed many of the alignment based class restrictions for PCs, 4th ed compressed the entire scheme and kinda nixed it. But 5e FR has brought back the Great Wheel, and the Forgotten Realms still draws on this stuff for its underlying lore and aspects of the religions, the various factions of planar monsters and such. The tic tac toe of alignment is just an organization tool and aid to imagination at this point for the PCs, but its useful for bringing different elements together to present it as a more cohesive whole in the world building.
I've heard a lot on the boards about good and evil, but hadn't seen much on the other spectrum of the scheme and I think the law vs chaos theme is at least as interesting. I mean given that this game actually begins in Baator lol. The bones are still there. Anyhow, some of the more memorable through lines in BG1/2 carried it off, so it'd be cool to see it in BG3.
