Complex sentence: In all, Strauss wrote 16 operettas and one opera, most with great success when first premiered although many are now largely forgotten, as his later librettists were less talented and he often composed independent of the plot.
Split into simpler sentences: In all, Strauss wrote 16 operettas and one opera, most with great success when first premiered. Many of his lesser operettas are now largely forgotten, since his later librettists were less talented and he often composed independent of the plot.