modding seems to have been a possibility but not neccesarily easy with the original sin games, even tho they wanted to push it quite abit.
WIht BG3, its harder. WOTC is involved so who knows what their stand on modding will be, the GW based games notoriously have that problem. (doesnt stop people fro m modding dawn of war 1 heavily)
I think the issue with modding will be that the scene just isnt that strong anymore.
I mean, what games other than Skyrim and Fallout get these realy big mod projects going?