These are commonly assumed to be dark times for classical radio, although whether there have ever been truly bright times for this genre I’m not completely sure. Although I almost seldom turn on my local radio station over the air, I am a very content user of many online stations. So for me, at least, it’s just a shift, not a loss.
Three streaming stations–chosen from many–that I particular enjoy:
WQXR from New York is high on my list. They still play opera every Saturday, and have recently launched a show called “The Sopranos” with Debbie Voight. Quite a good web site as well, and they have an app.
BBC Radio 3 is superb all around–not just for the Proms which they do every summer. Lots of interesting talk amidst 
the music, which has a good complement of live offerings, including Wigmore Hall. Shows are archived often for a week, and some for longer. If you are a choral singer or fan of that repertoire, their program “The Choir” is fascinating. Their web site is part of the overall BBC one, and they have an app, although last I checked it doesn’t work in the U.S.
My German is rudimentary, but that has not stopped me from listening a lot to BR-Klassik, out of Munich, which has the benefit of coming from a country that is well-provisioned with classical ensembles, be they orchestras, choral groups or operas. Lots of live music, and a refreshing range of what counts as classical. Their hourly nachrichten is a good test for anybody’s long ago German I. The only thing I can reliably get is the weather.
A Few Reasonable Words 