I'm pretty sure the NetBSD[1] and OpenBSD would dispute that statement. OpenBSD even compiles its ports directly (not cross compiled). Both projects benefit from these architectures by finding bugs.
Also, although not a popular company, Oracle just introduced a new SPARC and given Oracle's behavior, they wouldn't do it unless it had a profit and a future.
1) look at one of their exhibits, these folks believe in running on anything including toasters