I'm not trying to take a dig at you here, but literally 0 orchestration chops will change the sound of something recorded in a church vs a scoring stage. Sure you could record a film score in a church - but it doesn't sound iconically like a film score(i.e. cinematic)I don't subscribe to much of the jawing about "Hollywood sound" and "cinematic" when discussing libraries.
Most libraries, if you orchestrate the way it's done by JW or JNH or someone like that, can produce a movie sound, and if you arrange like Mozart, more that way. Of the two I still find it harder to do Mozart.
With multiple mic positions and all the articulations they provide (from soft to quite intense), I find that you can do quite a bit with SSS. I like CSS ok but find the sound of SSS more appealing -- just taste, and an aversion to vibrato. Still using Hollywood Strings and LASS too.
Apart from basic sound, it's handy to have ore than one library since, sometimes, one library or another has very small tuning issues. Accordingly, if you're writing dense harmony, you might find that you need to substitute a viola or cello or something from a different library to get that magic perfect tuning.
I'm not sure that it's that huge a decision; I've heard really nice music now for 15 years from composers who are great with samples. At this point I'd say choosing a library is more a matter of taste than its capability.
can you make great music with SSS? ofcourse! Andy Blaney could make great music with a sampled toaster... You could run something recorded on a scoring stage through a church IR much easier than you can EQ the church sound out of the samples.
I know we like to say warm and fuzzy things about composing, but the reality is that the samples are recorded with a certain sound because of the players, the signal chain, and the acoustic space they were sampled in. No amount of composing chops will take SSS out of the space it was recorded in, and the problems that it causes. You've been around for a very long time, and I know you know better. At the end of the day - if the OP(and you ofcourse) like the tone of SSS, that's fine... but no choice of notes will make the library magically be recorded in a different studio.
I appreciate the amount of articulations, but the sound is something you have to build your template around, and isn't very flexible