???
Well. New for me anyway. Now that you mention it, I do remember some saying this was done in DOS or something. I don't know. Never played them.
Well. Whatever. If you think about it, is anything really ever truly new? Even the concept of D&D is regurgitating ancient myths and lore. Right?
It is all about the twist you put on the same old story. What nee mysteries are they weaving? BG3 has its own mysteries going on, so yeah. New. It's not just retelling BG 1 and 2.