I always buy the latest version just to support the development team although I actually don't need any of the improvements the last years.
The Touch Bar behavior is known for almost 2 years now. If JRiver won't support Touch Bar that's fine for me but at least it should release the volume button to have effect on the system sound. The experience with jriver on a Mac is really not nice at all but stealing system functionality is a no go.
Just installed the latest major release 26 for Mac, being disappointed this issue isn't fixed.