I would maybe look at this a bit differently.
Where are the great classical artists in even the rest of Europe? The great classical composers of the 18th century were all German and all made their careers in Vienna, Austria in the 1700s. This was where you wanted to be. Its like the musical equivalent of silicon valley in the 2000s. Vienna was among the wealthiest cities in the world. Habsburg nobility had an unusual fascination with funding arts and culture. Spurs competition to push the art to its limit, in hopes of attracting the wealthiest backers. Budding industrial revolution make the production of complicated musical instruments more viable.