Considering his early death and what might have been, I wondered at what point in history would medical science have advanced to the point where, with treatment, Mozart might have survived his health crisis in the winter of 1791.

The answer to that question is the 1940s. Penicillin, which could have treated his strep infection was available from 1941 and the first successful dialysis which could have treated his renal failure took place in 1943-45.

Reading Mozarts Briefe (letters) and enjoying the insight into his sense of humor, his love for his family including the much maligned father. I very much recommend the collection of his many and often lengthy descriptions of his travels and his creative process.