before today, iv only ever heard of J-rpgs for japanese rpgs, I assume the C means computer rpgs
tt table top? , pprpg pen and paper?
There's just a few more like A-RPG (Action RPG), T-RPG (Tactical RPG) and the well known MMORPG (Massively Multiplayer Online RPG).
The biggest thing that makes BG3 very different than the cRPG I love the most is the lack of life in and the coherence of the world.
The lack of time / day / night / real time meteo effects / "random" or unexpected encounter, dangers and events that are not only triggered by the players actions / ennemies that may re-appear or new ennemies after some time...
What I like the most in cRPG is having the feeling that I'm part of an epic journey in a "real" / living /coherent world. In Larian's game I usually more have the feeling that I'm roaming on a playground than on a world. The map design is probably a bit guilty too.
Then there is all the inconsistencies or elements that do not make sense in relation to the universe (physics but also many systems / animations / VFX )
Their games does not miss a lot of things to be the best cRPG of all time in my opinion but immersion/coherence of the whole is not really what they foccus on yet.
I personnaly think that when they will, their games will become legendaries cRPG as much as The Witcher 3 is a legendary A-RPG.