With a simple softsynth you can do simple sounds. Cymbals, flutes, choirs etc. are a tad overkill for just some oscillator(s) and filter(s). The traditional substractive model is what ppl know however, and it's way overrated. As long as people keep making virtual versions of their bedroom analogue synths then all these softsynths will remain to be the same all the way.
All these substractive models are like what EA's "must be FPS" is for games. "Add a large cutoff knob, otherwise it won't sell"
All these substractive models are like what EA's "must be FPS" is for games. "Add a large cutoff knob, otherwise it won't sell"