We, the customers and users of JRiver MC, are a niche market. We are collectors, music lovers, (media) librarians, film enthusiasts, and the like. The key words here are collector, collection, and library. This is what MC is good at. This is why we use it.
Streaming is almost certainly the future. Whether or not MC ever supports it well is an open question. But, despite the historical financial reality (that most streaming services don't make a profit), I think it's here to stay. It's just too popular to go away.
We, the collectors will still be here with MC. I don't use any music streaming services at the moment. I use numerous video streaming services. I also have my own video collection being served to my TV by another platform. So, on the video side I do both. I suspect lots of people here listen to their own collections and to streaming services. You don't have to have one thing that does it all. In some cases a single solution might be advantageous. In other cases, not so much.
I don't think MC is really positioned very well to become a one stop shop for streaming services. That's just my opinion.
More importantly, MC's functionality for the collector is quite good, always has been, and hopefully will continue to be. Long live MC.
Brian.