since the game is still in EA, idk if we can say that the current BG3 build is 'wildly successful' yet at this stage in development - id lean more towards saying that this game has been/is still 'highly anticipated' given the baldurs gate IP (moreso than the developing studio), but it will depend on larian's vision and delivery to be considered 'wildly successful' (and idk what op would define as 'wildly successful' - a game can sell millions+ copies but still be considered a 'disappointment' [not a 1to1 example, but see the issues cyberpunk is having - not what i would consider a 'wildly successful' launch]).
i think that the current build we have in EA shows alot of promise, and i know that swen mentioned the million copies sold during EA metric cited above (which as an aside, i believe larian/swen also intimated was very much unexpected which does give me cause to pause and be slightly worried that the developer is unaware of how popular an ip BG is or how big a community still exists), but i think its too early to make a determination that the game is or will be wildly successful.
I have hope based on some of the responses/patches larian has implemented as a result of feedback cited here and in other places, but i still think we are aways from full launch and that there are some significant gaming mechanics that should be addressed by larian before launch that will contribute towards whether i personally consider the game a 'success', a successor to the BG ip, or a disappointment. i may be in the minority here, but i would actually prefer a lengthened development timeline (1-2+ years even) so to give larian more time/resources to further improve/enhance the game rather than setting a target date for launch and then rushing to get the game to a playable/serviceable state by that time