The day the content owner stop wanting to license their catalog, the platforms die. The majors let themselves go into that trap because they failed at finding a viable digital model and the streaming platform showed them a way to keep making some money. Show them a better model that works and they will follow the money.
In 2017, the classical music market was shrinking but still worth half a billion a year with 50% of that still being physical sales. I'm still convinced there was a market to capture.
For classical, streaming is not an option: most content on streaming services are old (albeit often great) records from the past coming from the majors catalog (which they don't care much about). That's 4 or 5 catalog. All the independents rejected the model because they can't make any money there.
Streaming is the death of the classical recording industry. Simply. There is no money in streaming. The sad part is that the average classical music consumer has generally a lot of disposable income available but no way to spend it on a good modern product, in a way that support that industry.
I don't know much about it, but it's probably true of Jazz too.