I think it is harder to become a really famous composer now than it was, but perhaps a bit easier to make a living at it. Back in the day, composers found work in composing for the day-to-day, like church (as mentioned before), but also at other events. Court composers wrote for just about every occasion, and even later composers (like Johann Strauss) wrote for special occasions. Those occasions are just different now. We have film, video games, and television. One could potentially make a bit of money as a church composer, but I wouldn't expect that to be the primary source of income. Also, regarding traditional concert pieces: I don't believe that the concert setting was quite the same back when Beethoven and friends were composing. From what I've read, these could sometimes be rather rowdy events, with lots of talking and drinking. Actually, it would be interesting to open up a classical bar/club, with a casual concert setting, open mic nights, and all that.