Well, this is just my opinion.I guess the question is what constitutes "all of 5e"? Just the two versions WotC put out? Other games that use the 5e rules?
The forums is called Dungeons and Dragons.
So its where I go to discuss D&D these days. (I don't frequent a lot of the other forums.)
Would I count ToV as D&D? Probably, it wouldn't hurt my feelings any to have a discussion there.