Leaving the definition of success aside, on Windows I can think of three things where free software is noticeably inferior: MS Office, Photoshop, games. But otherwise the market for small programs, utilities, etc. that existed fifteen years ago is essentially dead now. Partially it’s because so much moved into the browser, but partially it’s because good free alternatives exist (e.g. look at media players, for example).
Leaving the definition of success aside, on Windows I can think of three things where free software is noticeably inferior: MS Office, Photoshop, games. But otherwise the market for small programs, utilities, etc. that existed fifteen years ago is essentially dead now. Partially it’s because so much moved into the browser, but partially it’s because good free alternatives exist (e.g. look at media players, for example).