Hm, I don't know ... I think that this "bigger, bolder, louder" approach is marketing thing first and foremost. Things have become very loud and very big in the scoring world, and I'm not sure if there's a lot of room left for further gains before the last bits of musical subtlety are smothered underneath.
Appassionata Strings, Epic Horns and Fanfare Trumpets are already very big, and can be made to sound even more over the top by rather simple means. Does it really need more? Perhaps it may sound impressive to some when a sample library developer announces their new 200-piece-choir, or their "low woods" ensemble comprised of 15 bass clarinets and 15 contra bassoons. Makes me chuckle a bit though, and I'm not even making these numbers up. Not sure if that's the train we really need to see VSL jumping on.
There's a point after which things stop sounding bigger and mightier by adding more. Instead it starts to sound weaker, toneless, blunt, less focused and actually more fake. And then you have to make it somewhat crisp and firm through processing and trickery. Imagine if developers did that to their commercial libraries!.. 😉