"Hey ... 'third party stuffs' have their proper place, too!"
Today – let's face it – "we musicians are faced with an embarrassment of riches."
We have very-excellent stuff, including very-excellent stuff that is open source,
which our musical predecessors ... (koff, koff, "I was there and certainly couldn't afford it") ... sometimes "paid many-many
tens of thousands of dollars for," even though it was nothing like what we have available to us today. (Google terms like "Synclavier" and "Fairlight.")
So ... "get out there and make music!!"