steepholm

I don't follow the trends in classical composers' popularity in pop music. But within classical music itself, Brahms has never fallen out of popularity. He is one of the basic repertoire composers. (Remember "the three B's"?)

As for Spohr, yes, I hear something by him now and again. But that's part of a general trend over the last few decades to occasionally resurrect once-popular forgotten composers. Hummel and Ries show up once in a while too.